[c++1z] Remove terse range-based for loops; they've been removed from
consideration for C++17 for now. Update C++ status page to match.

llvm-svn: 222865
diff --git a/clang/lib/Parse/ParseStmt.cpp b/clang/lib/Parse/ParseStmt.cpp
index 1bfce60..752baf6 100644
--- a/clang/lib/Parse/ParseStmt.cpp
+++ b/clang/lib/Parse/ParseStmt.cpp
@@ -1520,9 +1520,7 @@
     else
       ForRangeInit.RangeExpr = ParseExpression();
 
-    Diag(Loc, getLangOpts().CPlusPlus1z
-                  ? diag::warn_cxx14_compat_for_range_identifier
-                  : diag::ext_for_range_identifier)
+    Diag(Loc, diag::err_for_range_identifier)
       << ((getLangOpts().CPlusPlus11 && !getLangOpts().CPlusPlus1z)
               ? FixItHint::CreateInsertion(Loc, "auto &&")
               : FixItHint());