resolve comments

include/grpc++/impl/codegen/async_unary_call.h

@@ -106,9 +106,9 @@ class ClientAsyncResponseReader final
   // This operator should never be called as the memory should be freed as part
   // of the arena destruction. It only exists to provide a matching operator
   // delete to the operator new so that some compilers will not complain (see
-  // Issue# 11301). Note at the time of adding this there is no tests catching
-  // the compiler warning.
-  static void operator delete(void*, void*) {}
+  // https://github.com/grpc/grpc/issues/11301) Note at the time of adding this
+  // there are no tests catching the compiler warning.
+  static void operator delete(void*, void*) { assert(0); }
 
   void StartCall() override {
     assert(!started_);