[clang][Sema][NFC] Remove unused delayed template parsing cleanup callback (llvm#164149)

The last use of it was removed in 6163aa9.

Author: localspook

clang/include/clang/Sema/Sema.h

@@ -1321,15 +1321,11 @@ class Sema final : public SemaBase {
 
   /// Callback to the parser to parse templated functions when needed.
   typedef void LateTemplateParserCB(void *P, LateParsedTemplate &LPT);
-  typedef void LateTemplateParserCleanupCB(void *P);
   LateTemplateParserCB *LateTemplateParser;
-  LateTemplateParserCleanupCB *LateTemplateParserCleanup;
   void *OpaqueParser;
 
-  void SetLateTemplateParser(LateTemplateParserCB *LTP,
-                             LateTemplateParserCleanupCB *LTPCleanup, void *P) {
+  void SetLateTemplateParser(LateTemplateParserCB *LTP, void *P) {
     LateTemplateParser = LTP;
-    LateTemplateParserCleanup = LTPCleanup;
     OpaqueParser = P;
   }
 

clang/lib/Parse/Parser.cpp

@@ -708,7 +708,7 @@ bool Parser::ParseTopLevelDecl(DeclGroupPtrTy &Result,
     }
 
     // Late template parsing can begin.
-    Actions.SetLateTemplateParser(LateTemplateParserCallback, nullptr, this);
+    Actions.SetLateTemplateParser(LateTemplateParserCallback, this);
     Actions.ActOnEndOfTranslationUnit();
     //else don't tell Sema that we ended parsing: more input might come.
     return true;

clang/lib/Sema/Sema.cpp

@@ -276,10 +276,9 @@ Sema::Sema(Preprocessor &pp, ASTContext &ctxt, ASTConsumer &consumer,
       Context(ctxt), Consumer(consumer), Diags(PP.getDiagnostics()),
       SourceMgr(PP.getSourceManager()), APINotes(SourceMgr, LangOpts),
       AnalysisWarnings(*this), ThreadSafetyDeclCache(nullptr),
-      LateTemplateParser(nullptr), LateTemplateParserCleanup(nullptr),
-      OpaqueParser(nullptr), CurContext(nullptr), ExternalSource(nullptr),
-      StackHandler(Diags), CurScope(nullptr), Ident_super(nullptr),
-      AMDGPUPtr(std::make_unique<SemaAMDGPU>(*this)),
+      LateTemplateParser(nullptr), OpaqueParser(nullptr), CurContext(nullptr),
+      ExternalSource(nullptr), StackHandler(Diags), CurScope(nullptr),
+      Ident_super(nullptr), AMDGPUPtr(std::make_unique<SemaAMDGPU>(*this)),
       ARMPtr(std::make_unique<SemaARM>(*this)),
       AVRPtr(std::make_unique<SemaAVR>(*this)),
       BPFPtr(std::make_unique<SemaBPF>(*this)),
@@ -1248,9 +1247,6 @@ void Sema::ActOnEndOfTranslationUnit() {
             ? TUFragmentKind::Private
             : TUFragmentKind::Normal);
 
-    if (LateTemplateParserCleanup)
-      LateTemplateParserCleanup(OpaqueParser);
-
     CheckDelayedMemberExceptionSpecs();
   } else {
     // If we are building a TU prefix for serialization, it is safe to transfer