Remove unused test-only retrieval helpers

src/nexusrag/retrieval/dense.py

@@ -42,11 +42,3 @@ def retrieve(
 
         return [RetrievalResult(chunk=r.chunk, score=r.score, source="dense") for r in results]
 
-    def retrieve_with_threshold(
-        self,
-        query: str,
-        top_k: int = 5,
-        min_score: float = 0.3,
-    ) -> list[RetrievalResult]:
-        results = self.retrieve(query, top_k)
-        return [r for r in results if r.score >= min_score]

src/nexusrag/retrieval/hybrid.py

@@ -75,8 +75,7 @@ def retrieve_with_dense_top(
         """Fused results plus the top dense cosine score, from one dense pass."""
         return self._run(query, top_k, depth)
 
-    def retrieve_dense_only(self, query: str, top_k: int = 10) -> list[RetrievalResult]:
-        return self.dense.retrieve(query, top_k)
+
 
 
 class AdaptiveHybridRetriever(HybridRetriever):

tests/unit/test_retrieval.py

@@ -86,10 +86,6 @@ def test_retrieve_passes_through_store(self, retriever):
         assert [r.chunk.id for r in results] == ["chunk2", "chunk1"]
         assert all(r.source == "dense" for r in results)
 
-    def test_threshold_filters_low_scores(self, retriever):
-        results = retriever.retrieve_with_threshold("q", top_k=5, min_score=0.8)
-        assert len(results) == 1 and results[0].score >= 0.8
-
 
 class TestHybridRetriever:
     @pytest.fixture
@@ -122,10 +118,7 @@ def test_negative_weight_rejected(self, dense, sparse):
         with pytest.raises(ValueError):
             HybridRetriever(dense, sparse, dense_weight=-0.1, sparse_weight=0.3)
 
-    def test_single_retriever_paths_skip_fusion(self, dense, sparse):
-        hybrid = HybridRetriever(dense, sparse)
-        assert all(r.source == "dense" for r in hybrid.retrieve_dense_only("q", 3))
-        sparse.retrieve.assert_not_called()
+
 
     def test_empty_results(self, dense, sparse):
         dense.retrieve.return_value = []