Remove commented out code.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@175699 91177308-0d34-0410-b5e6-96231b3b80d8

lib/AST/ASTDiagnostic.cpp

@@ -855,7 +855,7 @@ class TemplateDiff {
                           FromIter->getKind() == TemplateArgument::Integral;
         bool HasToInt = !ToIter.isEnd() &&
                         ToIter->getKind() == TemplateArgument::Integral;
-        //bool IsValidFromInt = false, IsValidToInt = false;
+
         if (HasFromInt)
           FromInt = FromIter->getAsIntegral();
         else