Temporarily revert r183462: "Implement DR7"

This fixes PR16370, I'll add the test case in a follow-up commit.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@184401 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Sema/SemaDeclCXX.cpp b/lib/Sema/SemaDeclCXX.cpp
index d09b0ee..5a70d2a 100644
--- a/lib/Sema/SemaDeclCXX.cpp
+++ b/lib/Sema/SemaDeclCXX.cpp
@@ -1311,7 +1311,7 @@
   assert(BaseDecl && "Record type has no declaration");
   BaseDecl = BaseDecl->getDefinition();
   assert(BaseDecl && "Base type is not incomplete, but has no definition");
-  CXXRecordDecl *CXXBaseDecl = cast<CXXRecordDecl>(BaseDecl);
+  CXXRecordDecl * CXXBaseDecl = cast<CXXRecordDecl>(BaseDecl);
   assert(CXXBaseDecl && "Base type is not a C++ type");
 
   // C++ [class]p3:
@@ -3790,17 +3790,10 @@
 
     CXXDestructorDecl *Dtor = LookupDestructor(BaseClassDecl);
     assert(Dtor && "No dtor found for BaseClassDecl!");
-    if (CheckDestructorAccess(
-            ClassDecl->getLocation(), Dtor,
-            PDiag(diag::err_access_dtor_vbase)
-                << Context.getTypeDeclType(ClassDecl) << VBase->getType(),
-            Context.getTypeDeclType(ClassDecl)) ==
-        AR_accessible) {
-      CheckDerivedToBaseConversion(
-          Context.getTypeDeclType(ClassDecl), VBase->getType(),
-          diag::err_access_dtor_vbase, 0, ClassDecl->getLocation(),
-          SourceRange(), DeclarationName(), 0);
-    }
+    CheckDestructorAccess(ClassDecl->getLocation(), Dtor,
+                          PDiag(diag::err_access_dtor_vbase)
+                            << VBase->getType(),
+                          Context.getTypeDeclType(ClassDecl));
 
     MarkFunctionReferenced(Location, const_cast<CXXDestructorDecl*>(Dtor));
     DiagnoseUseOfDecl(Dtor, Location);