Remove empty non-virtual destructors or mark them =default when non-public

These add no value but can make a class non-trivially copyable. NFC.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@234688 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Transforms/ObjCARC/ARCRuntimeEntryPoints.h

@@ -54,8 +54,6 @@ public:
                             RetainAutorelease(nullptr),
                             RetainAutoreleaseRV(nullptr) { }
 
-  ~ARCRuntimeEntryPoints() { }
-
   void init(Module *M) {
     TheModule = M;
     AutoreleaseRV = nullptr;