code: public function deleteByEmail( $email, $config = [] ) {
  
  		$member	= $this->getByEmail( $email );
  
  		if( isset( $member ) ) {
  
  			$modelClass	= static::$modelClass;
  
  			// Delete from mailing list
  			Yii::$app->factory->get( 'newsletterListService' )->deleteByMemberId( $member->id );
  
  			// Delete member
  			return $modelClass::deleteByEmail( $email );
  		}
  
  		return false;
  	}
docs: Delete -------------