refactor(Core): apply clang-tidy modernize-use-equals-default (#3834)

src/server/game/Grids/Grid.h

@@ -40,7 +40,7 @@ public:
     /** destructor to clean up its resources. This includes unloading the
     grid if it has not been unload.
     */
-    ~Grid() {}
+    ~Grid() = default;
 
     /** an object of interested enters the grid
      */