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();
	}
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]
Remove this Object from the user favorites