[clang] [clang] remove ClassScopeFunctionSpecializationDecl (PR #66636)

[Krystian Stasiowski via cfe-commits]

================
@@ -650,17 +642,16 @@ void ASTDeclWriter::VisitFunctionDecl(FunctionDecl *D) {
     DependentFunctionTemplateSpecializationInfo *
       DFTSInfo = D->getDependentSpecializationInfo();
 
-    // Templates.
-    Record.push_back(DFTSInfo->getNumTemplates());
-    for (int i=0, e = DFTSInfo->getNumTemplates(); i != e; ++i)
-      Record.AddDeclRef(DFTSInfo->getTemplate(i));
+    // Candidates.
+    Record.push_back(DFTSInfo->getCandidates().size());
----------------
sdkrystian wrote:

`DependentFunctionTemplateSpecializationInfo` stores the number of candidates in an `unsigned` member, so it should be fine. 

https://github.com/llvm/llvm-project/pull/66636