Core/Units: Remove unused argument from Unit::SetRooted

Port From (https://github.com/TrinityCore/TrinityCore/commit/88d878375899769a894fd7edf31d5386effcd6c5)

Source/Game/Entities/Unit/Unit.Movement.cs

@@ -1551,9 +1551,7 @@ namespace Game.Entities
             }
         }
 
-        public void SetRooted(bool apply, bool packetOnly = false)
-        {
-            if (!packetOnly)
+        public void SetRooted(bool apply)
         {
             if (apply)
             {
@@ -1566,7 +1564,6 @@ namespace Game.Entities
             }
             else
                 RemoveUnitMovementFlag(MovementFlag.Root);
-            }
 
             Player playerMover = GetUnitBeingMoved()?.ToPlayer();// unit controlled by a player.
             if (playerMover != null)