Core/Units: Started work on updating movement (main goal: remove SendMovementFlagUpdate())

src/server/game/Entities/Object/Object.cpp

@@ -2539,12 +2539,6 @@ void WorldObject::BuildMonsterChat(WorldPacket* data, uint8 msgtype, char const*
     }
 }
 
-void Unit::BuildHeartBeatMsg(WorldPacket* data) const
-{
-    data->Initialize(MSG_MOVE_HEARTBEAT, 32);
-    WriteMovementInfo(*data);
-}
-
 void WorldObject::SendMessageToSet(WorldPacket* data, bool self)
 {
     if (IsInWorld())