fix(Core/Map): remove hackfix that blocked update of GOs beeing set active (#18812)

- this just broke the whole purpose of setActive(true) if the
  gameobjects is still not really beeing set active afterwards
- GetGridActivationRange() returns 0.0f for gameobjects anyways
- so CalculateCellArea() will result in the minimal cell area
  around the gameobject's position
- if the cell around the gameobject should not be updated, the
  gameobject should not have been set active in the first place

src/server/game/Maps/Map.cpp

@@ -702,9 +702,6 @@ void Map::VisitNearbyCellsOf(WorldObject* obj, TypeContainerVisitor<Acore::Objec
     if (!obj->IsPositionValid())
         return;
 
-    if (obj->GetGridActivationRange() <= 0.0f) // pussywizard: gameobjects for example are on active lists, but range is equal to 0 (they just prevent grid unloading)
-        return;
-
     // Update mobs/objects in ALL visible cells around object!
     CellArea area = Cell::CalculateCellArea(obj->GetPositionX(), obj->GetPositionY(), obj->GetGridActivationRange());