[NFC][Clang] Adopt simplified getTrailingObjects in ParsedTemplate (#143255)

Author: jurahul

clang/include/clang/Sema/ParsedAttr.h

@@ -130,9 +130,6 @@ class ParsedAttr final
   size_t numTrailingObjects(OverloadToken<ParsedType>) const {
     return HasParsedType;
   }
-  size_t numTrailingObjects(OverloadToken<detail::PropertyData>) const {
-    return IsProperty;
-  }
 
 private:
   IdentifierInfo *MacroII = nullptr;

clang/include/clang/Sema/ParsedTemplate.h

@@ -190,9 +190,7 @@ namespace clang {
     bool ArgsInvalid;
 
     /// Retrieves a pointer to the template arguments
-    ParsedTemplateArgument *getTemplateArgs() {
-      return getTrailingObjects<ParsedTemplateArgument>();
-    }
+    ParsedTemplateArgument *getTemplateArgs() { return getTrailingObjects(); }
 
     /// Creates a new TemplateIdAnnotation with NumArgs arguments and
     /// appends it to List.