src/Traits/Favoriteable.php
public function removeFavorite($user_id = null)
	{
		$this->favorites()->where('user_id', ($user_id) ? $user_id : Auth::id())->delete();
	}
public function removeFavorite($user_id = null)
	{
		$this->favorites()->where('user_id', ($user_id) ? $user_id : Auth::id())->delete();
	}
Remove this Object from the user favorites

@param  int $user_id  [if  null its added to the auth user]