Revert unnecessary tblgen change.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@267788 91177308-0d34-0410-b5e6-96231b3b80d8

utils/TableGen/ClangAttrEmitter.cpp

@@ -2524,7 +2524,6 @@ static std::string CalculateDiagnostic(const Record &S) {
     case ObjCProtocol | ObjCInterface:
       return "ExpectedObjectiveCInterfaceOrProtocol";
     case Field | Var: return "ExpectedFieldOrGlobalVar";
-    case GenericRecord | Namespace: return "ExpectedRecordOrNamespace";
   }
 
   PrintFatalError(S.getLoc(),