Revert "Detect uses of mismatching forms of 'new' and 'delete'"

This reverts commit 742dc9b6c9686ab52860b7da39c3a126d8a97fbc.

This is generating multiple segfaults in our internal builds.
Test case coming up shortly.

llvm-svn: 237391

clang/lib/Sema/MultiplexExternalSemaSource.cpp

@@ -212,15 +212,7 @@ void MultiplexExternalSemaSource::ReadUndefinedButUsed(
   for(size_t i = 0; i < Sources.size(); ++i)
     Sources[i]->ReadUndefinedButUsed(Undefined);
 }
-
-void MultiplexExternalSemaSource::ReadMismatchingDeleteExpressions(
-    llvm::MapVector<FieldDecl *,
-                    llvm::SmallVector<std::pair<SourceLocation, bool>, 4>> &
-        Exprs) {
-  for (auto &Source : Sources)
-    Source->ReadMismatchingDeleteExpressions(Exprs);
-}
-
+  
 bool MultiplexExternalSemaSource::LookupUnqualified(LookupResult &R, Scope *S){ 
   for(size_t i = 0; i < Sources.size(); ++i)
     Sources[i]->LookupUnqualified(R, S);