callback: mock_verify() has no effect.

callback has a later priority than expect, so setting call_instance
to CMOCK_GUTS_NONE at this point has no effect.  This mock_verify()
has probably been obsolete for a long time.

lib/cmock_generator_plugin_callback.rb

@@ -79,10 +79,4 @@ class CMockGeneratorPluginCallback
     lines << "  Mock.#{func_name}_CallbackBool = (int)0;\n"
     lines << "  Mock.#{func_name}_CallbackFunctionPointer = Callback;\n}\n\n"
   end
-
-  def mock_verify(function)
-    func_name = function[:name]
-    "  if (Mock.#{func_name}_CallbackFunctionPointer != NULL)\n    call_instance = CMOCK_GUTS_NONE;\n"
-  end
-
 end