Revert "[-cxx-abi microsoft] Mangle reference temporaries"

This reverts commit r197184.

Richard Smith brings up some good points, a proper implementation will
require us to mangle unnameable entities compatibly with MSVC.

llvm-svn: 197192
diff --git a/clang/lib/AST/MicrosoftMangle.cpp b/clang/lib/AST/MicrosoftMangle.cpp
index a02571e..24eac84 100644
--- a/clang/lib/AST/MicrosoftMangle.cpp
+++ b/clang/lib/AST/MicrosoftMangle.cpp
@@ -2040,9 +2040,10 @@
 }
 
 void MicrosoftMangleContextImpl::mangleReferenceTemporary(const VarDecl *VD,
-                                                          raw_ostream &Out) {
-  MicrosoftCXXNameMangler mangler(*this, Out);
-  mangler.mangle(VD);
+                                                          raw_ostream &) {
+  unsigned DiagID = getDiags().getCustomDiagID(DiagnosticsEngine::Error,
+    "cannot mangle this reference temporary yet");
+  getDiags().Report(VD->getLocation(), DiagID);
 }
 
 void MicrosoftMangleContextImpl::mangleStaticGuardVariable(const VarDecl *VD,