diff --git a/check_api/src/main/java/com/google/errorprone/matchers/Matchers.java b/check_api/src/main/java/com/google/errorprone/matchers/Matchers.java
index dc687cd35f7..b8b338e33df 100644
--- a/check_api/src/main/java/com/google/errorprone/matchers/Matchers.java
+++ b/check_api/src/main/java/com/google/errorprone/matchers/Matchers.java
@@ -31,7 +31,6 @@
 import static com.google.errorprone.suppliers.Suppliers.typeFromClass;
 import static com.google.errorprone.suppliers.Suppliers.typeFromString;
 import static com.google.errorprone.util.ASTHelpers.findEnclosingMethod;
-import static com.google.errorprone.util.ASTHelpers.findEnclosingNode;
 import static com.google.errorprone.util.ASTHelpers.getSymbol;
 import static com.google.errorprone.util.ASTHelpers.getType;
 import static com.google.errorprone.util.ASTHelpers.isSubtype;
@@ -1132,16 +1131,7 @@ public static <T extends Tree> Matcher<T> inSynchronized() {
         return true;
       }
 
-      boolean enclosingMethodFix =
-          state
-              .errorProneOptions()
-              .getFlags()
-              .getBoolean("ASTHelpers:EnclosingMethodFix")
-              .orElse(true);
-      MethodTree methodTree =
-          enclosingMethodFix
-              ? findEnclosingMethod(state)
-              : findEnclosingNode(state.getPath(), MethodTree.class);
+      MethodTree methodTree = findEnclosingMethod(state);
       return methodTree != null
           && methodTree.getModifiers().getFlags().contains(Modifier.SYNCHRONIZED);
     };
diff --git a/core/src/main/java/com/google/errorprone/bugpatterns/AbstractMustBeClosedChecker.java b/core/src/main/java/com/google/errorprone/bugpatterns/AbstractMustBeClosedChecker.java
index 292bf4b0590..d3dd7afa354 100644
--- a/core/src/main/java/com/google/errorprone/bugpatterns/AbstractMustBeClosedChecker.java
+++ b/core/src/main/java/com/google/errorprone/bugpatterns/AbstractMustBeClosedChecker.java
@@ -45,7 +45,6 @@
 import com.google.common.base.CaseFormat;
 import com.google.common.collect.HashMultiset;
 import com.google.common.collect.Multiset;
-import com.google.errorprone.ErrorProneFlags;
 import com.google.errorprone.VisitorState;
 import com.google.errorprone.annotations.ForOverride;
 import com.google.errorprone.annotations.MustBeClosed;
@@ -77,20 +76,12 @@
 import java.util.Optional;
 import java.util.stream.Stream;
 import javax.lang.model.element.ElementKind;
-import org.jspecify.annotations.Nullable;
 
 /**
  * An abstract check for resources that must be closed; used by {@link StreamResourceLeak} and
  * {@link MustBeClosedChecker}.
  */
 public abstract class AbstractMustBeClosedChecker extends BugChecker {
-  private final boolean useAstHelpersEnclosingMethod;
-
-  protected AbstractMustBeClosedChecker(ErrorProneFlags flags) {
-    this.useAstHelpersEnclosingMethod =
-        flags.getBoolean("ASTHelpers:EnclosingMethodFix").orElse(true);
-  }
-
   private static final String MUST_BE_CLOSED_ANNOTATION_NAME =
       MustBeClosed.class.getCanonicalName();
 
@@ -257,8 +248,7 @@ protected boolean exemptChange(ExpressionTree tree, VisitorState state) {
 
   private Optional<Change> checkClosed(
       ExpressionTree tree, VisitorState state, NameSuggester suggester) {
-    MethodTree callerMethodTree =
-        useAstHelpersEnclosingMethod ? findEnclosingMethod(state) : buggyFindEnclosingMethod(state);
+    MethodTree callerMethodTree = findEnclosingMethod(state);
     TreePath path = state.getPath();
     OUTER:
     while (true) {
@@ -364,28 +354,6 @@ private static Optional<Change> findingWithNoFix() {
     return Change.of(SuggestedFix.emptyFix());
   }
 
-  /**
-   * Returns the enclosing method of the given visitor state. Returns null if the state is within a
-   * lambda expression or anonymous class <b>or (bug!) other class-creation expression</b>.
-   */
-  private static @Nullable MethodTree buggyFindEnclosingMethod(VisitorState state) {
-    for (Tree node : state.getPath().getParentPath()) {
-      switch (node) {
-        case LambdaExpressionTree let -> {
-          return null;
-        }
-        case NewClassTree nct -> {
-          return null;
-        }
-        case MethodTree methodTree -> {
-          return methodTree;
-        }
-        default -> {}
-      }
-    }
-    return null;
-  }
-
   private static boolean isClosedInFinallyClause(VarSymbol var, TreePath path, VisitorState state) {
     if (!isConsideredFinal(var)) {
       return false;
diff --git a/core/src/main/java/com/google/errorprone/bugpatterns/DoubleBraceInitialization.java b/core/src/main/java/com/google/errorprone/bugpatterns/DoubleBraceInitialization.java
index 9e90456ac86..f8a50ba5109 100644
--- a/core/src/main/java/com/google/errorprone/bugpatterns/DoubleBraceInitialization.java
+++ b/core/src/main/java/com/google/errorprone/bugpatterns/DoubleBraceInitialization.java
@@ -29,7 +29,6 @@
 import com.google.common.collect.ImmutableList;
 import com.google.common.collect.Iterables;
 import com.google.errorprone.BugPattern;
-import com.google.errorprone.ErrorProneFlags;
 import com.google.errorprone.VisitorState;
 import com.google.errorprone.bugpatterns.BugChecker.NewClassTreeMatcher;
 import com.google.errorprone.fixes.Fix;
@@ -60,7 +59,6 @@
 import java.util.Collection;
 import java.util.List;
 import java.util.Optional;
-import javax.inject.Inject;
 import javax.lang.model.element.ElementKind;
 import javax.lang.model.element.Modifier;
 
@@ -71,14 +69,6 @@
             + " pattern.",
     severity = ERROR)
 public class DoubleBraceInitialization extends BugChecker implements NewClassTreeMatcher {
-
-  private final boolean enclosingMethodFix;
-
-  @Inject
-  DoubleBraceInitialization(ErrorProneFlags flags) {
-    this.enclosingMethodFix = flags.getBoolean("ASTHelpers:EnclosingMethodFix").orElse(true);
-  }
-
   @SuppressWarnings("ImmutableEnumChecker") // Matcher is immutable in practice
   enum CollectionTypes {
     MAP("Map", "put", "ImmutableMap"),
@@ -110,8 +100,7 @@ enum CollectionTypes {
                   .named("unmodifiable" + type));
     }
 
-    Optional<Fix> maybeFix(
-        NewClassTree tree, VisitorState state, BlockTree block, boolean enclosingMethodFix) {
+    Optional<Fix> maybeFix(NewClassTree tree, VisitorState state, BlockTree block) {
       // scan the body for mutator methods (add, put) and record their arguments for rewriting as
       // a static factory method
       List<List<? extends ExpressionTree>> arguments = new ArrayList<>();
@@ -167,14 +156,9 @@ Optional<Fix> maybeFix(
         }
         if (enclosing instanceof ReturnTree returnTree) {
           toReplace = returnTree.getExpression();
-          MethodTree enclosingMethod;
-          if (enclosingMethodFix) {
-            TreePath enclosingMethodPath = findEnclosingMethodPath(path);
-            enclosingMethod =
-                enclosingMethodPath == null ? null : (MethodTree) enclosingMethodPath.getLeaf();
-          } else {
-            enclosingMethod = ASTHelpers.findEnclosingNode(path, MethodTree.class);
-          }
+          TreePath enclosingMethodPath = findEnclosingMethodPath(path);
+          MethodTree enclosingMethod =
+              enclosingMethodPath == null ? null : (MethodTree) enclosingMethodPath.getLeaf();
           typeTree = enclosingMethod == null ? null : enclosingMethod.getReturnType();
         }
         break;
@@ -251,10 +235,7 @@ public Description matchNewClass(NewClassTree tree, VisitorState state) {
       return NO_MATCH;
     }
     Description.Builder description = buildDescription(tree);
-    collectionType
-        .get()
-        .maybeFix(tree, state, block, enclosingMethodFix)
-        .ifPresent(description::addFix);
+    collectionType.get().maybeFix(tree, state, block).ifPresent(description::addFix);
     return description.build();
   }
 }
diff --git a/core/src/main/java/com/google/errorprone/bugpatterns/MustBeClosedChecker.java b/core/src/main/java/com/google/errorprone/bugpatterns/MustBeClosedChecker.java
index cfd200260eb..375035dce23 100644
--- a/core/src/main/java/com/google/errorprone/bugpatterns/MustBeClosedChecker.java
+++ b/core/src/main/java/com/google/errorprone/bugpatterns/MustBeClosedChecker.java
@@ -29,7 +29,6 @@
 import static com.google.errorprone.util.AnnotationNames.MUST_BE_CLOSED_ANNOTATION;
 
 import com.google.errorprone.BugPattern;
-import com.google.errorprone.ErrorProneFlags;
 import com.google.errorprone.VisitorState;
 import com.google.errorprone.bugpatterns.BugChecker.ClassTreeMatcher;
 import com.google.errorprone.bugpatterns.BugChecker.MethodTreeMatcher;
@@ -48,7 +47,6 @@
 import com.sun.source.tree.Tree;
 import com.sun.tools.javac.code.Symbol.MethodSymbol;
 import com.sun.tools.javac.code.Type;
-import javax.inject.Inject;
 
 /**
  * Checks if a constructor or method annotated with {@link
@@ -65,11 +63,6 @@
     severity = ERROR)
 public class MustBeClosedChecker extends AbstractMustBeClosedChecker
     implements MethodTreeMatcher, ClassTreeMatcher {
-  @Inject
-  MustBeClosedChecker(ErrorProneFlags flags) {
-    super(flags);
-  }
-
   private static final Matcher<Tree> IS_AUTOCLOSEABLE = isSubtypeOf(AutoCloseable.class);
 
   private static final Matcher<MethodTree> METHOD_RETURNS_AUTO_CLOSEABLE_MATCHER =
diff --git a/core/src/main/java/com/google/errorprone/bugpatterns/ReturnsNullCollection.java b/core/src/main/java/com/google/errorprone/bugpatterns/ReturnsNullCollection.java
index 562463b37e2..ae2bf85af51 100644
--- a/core/src/main/java/com/google/errorprone/bugpatterns/ReturnsNullCollection.java
+++ b/core/src/main/java/com/google/errorprone/bugpatterns/ReturnsNullCollection.java
@@ -27,7 +27,6 @@
 import static com.sun.source.tree.Tree.Kind.NULL_LITERAL;
 
 import com.google.errorprone.BugPattern;
-import com.google.errorprone.ErrorProneFlags;
 import com.google.errorprone.VisitorState;
 import com.google.errorprone.bugpatterns.BugChecker.ReturnTreeMatcher;
 import com.google.errorprone.dataflow.nullnesspropagation.TrustingNullnessAnalysis;
@@ -35,10 +34,6 @@
 import com.google.errorprone.matchers.Matcher;
 import com.sun.source.tree.MethodTree;
 import com.sun.source.tree.ReturnTree;
-import com.sun.source.tree.StatementTree;
-import com.sun.source.util.TreePath;
-import javax.inject.Inject;
-import org.jspecify.annotations.Nullable;
 
 /**
  * Flags methods with collection return types which return {@code null} in some cases but don't
@@ -52,15 +47,6 @@
             + " annotate the method as @Nullable. See Effective Java 3rd Edition Item 54.",
     severity = SUGGESTION)
 public class ReturnsNullCollection extends BugChecker implements ReturnTreeMatcher {
-
-  private final boolean useAstHelpersEnclosingMethod;
-
-  @Inject
-  ReturnsNullCollection(ErrorProneFlags flags) {
-    this.useAstHelpersEnclosingMethod =
-        flags.getBoolean("ASTHelpers:EnclosingMethodFix").orElse(true);
-  }
-
   private static boolean methodWithoutNullable(MethodTree tree, VisitorState state) {
     return !TrustingNullnessAnalysis.hasNullableAnnotation(getSymbol(tree));
   }
@@ -79,8 +65,7 @@ public final Description matchReturn(ReturnTree tree, VisitorState state) {
     if (tree.getExpression() == null || tree.getExpression().getKind() != NULL_LITERAL) {
       return NO_MATCH;
     }
-    MethodTree methodTree =
-        useAstHelpersEnclosingMethod ? findEnclosingMethod(state) : buggyFindEnclosingMethod(state);
+    MethodTree methodTree = findEnclosingMethod(state);
     if (methodTree == null) {
       return NO_MATCH;
     }
@@ -89,19 +74,4 @@ public final Description matchReturn(ReturnTree tree, VisitorState state) {
     }
     return describeMatch(tree);
   }
-
-  /**
-   * Returns the enclosing method of the given visitor state. Returns null if the state is within a
-   * lambda expression or anonymous class <b>or (bug!) {@code catch} block</b>.
-   */
-  private static @Nullable MethodTree buggyFindEnclosingMethod(VisitorState state) {
-    TreePath path = state.getPath();
-    while (path != null && path.getLeaf() instanceof StatementTree) {
-      path = path.getParentPath();
-    }
-    if (path == null || !(path.getLeaf() instanceof MethodTree)) {
-      return null;
-    }
-    return (MethodTree) path.getLeaf();
-  }
 }
diff --git a/core/src/main/java/com/google/errorprone/bugpatterns/StreamResourceLeak.java b/core/src/main/java/com/google/errorprone/bugpatterns/StreamResourceLeak.java
index 141410d2718..b804d837078 100644
--- a/core/src/main/java/com/google/errorprone/bugpatterns/StreamResourceLeak.java
+++ b/core/src/main/java/com/google/errorprone/bugpatterns/StreamResourceLeak.java
@@ -20,7 +20,6 @@
 import static com.google.errorprone.util.ASTHelpers.getStartPosition;
 
 import com.google.errorprone.BugPattern;
-import com.google.errorprone.ErrorProneFlags;
 import com.google.errorprone.VisitorState;
 import com.google.errorprone.bugpatterns.BugChecker.MethodTreeMatcher;
 import com.google.errorprone.fixes.SuggestedFix;
@@ -45,7 +44,6 @@
 import java.util.List;
 import java.util.Objects;
 import java.util.Optional;
-import javax.inject.Inject;
 
 /** A {@link BugChecker}; see the associated {@link BugPattern} annotation for details. */
 @BugPattern(
@@ -55,11 +53,6 @@
             + " try-with-resources",
     severity = WARNING)
 public class StreamResourceLeak extends AbstractMustBeClosedChecker implements MethodTreeMatcher {
-  @Inject
-  StreamResourceLeak(ErrorProneFlags flags) {
-    super(flags);
-  }
-
   public static final Matcher<ExpressionTree> MATCHER =
       MethodMatchers.staticMethod()
           .onClass("java.nio.file.Files")