Core/Players: Don't remove unlearned spells from action bars

src/server/game/Entities/Player/Player.cpp

@@ -5818,13 +5818,6 @@ bool Player::IsActionButtonDataValid(uint8 button, uint32 action, uint8 type) co
                     action, button, GetName().c_str(), GetGUID().ToString().c_str());
                 return false;
             }
-
-            if (!HasSpell(action))
-            {
-                TC_LOG_DEBUG("entities.player", "Player::IsActionButtonDataValid: Spell action %u not added into button %u for player %s (%s): player does not known this spell, this can be due to a player changing their talents",
-                    action, button, GetName().c_str(), GetGUID().ToString().c_str());
-                return false;
-            }
             break;
         case ACTION_BUTTON_ITEM:
             if (!sObjectMgr->GetItemTemplate(action))