doc: add documentation-only deprecation for multiple Hmac.digest() calls (DEP0206)

Author: Anshikakalpana

doc/api/deprecations.md

@@ -4564,7 +4564,7 @@ removed in a future version of Node.js.
 changes:
   - version: REPLACEME
     pr-url: https://github.com/nodejs/node/pull/XXXXX
-    description: Runtime deprecation.
+    description: Documentation-only deprecation.
 -->
 
 Type: Runtime

lib/internal/crypto/hash.js

@@ -87,13 +87,6 @@ const maybeEmitDeprecationWarning = getDeprecationWarningEmitter(
   },
 );
 
-const emitHmacDoubleDigestDeprecation = getDeprecationWarningEmitter(
-  'DEP0206',
-  'Calling digest() on an already-finalized Hmac instance is deprecated.',
-  undefined,
-  false,
-);
-
 function Hash(algorithm, options) {
   if (!new.target)
     return new Hash(algorithm, options);
@@ -190,7 +183,6 @@ Hmac.prototype.digest = function digest(outputEncoding) {
   const state = this[kState];
 
   if (state[kFinalized]) {
-    emitHmacDoubleDigestDeprecation();
     const buf = Buffer.from('');
     if (outputEncoding && outputEncoding !== 'buffer')
       return buf.toString(outputEncoding);