Remove bulk subscriber with firstname

function remove_subscribers() {
				global $wpdb;
				$args		 = array( 'role' => 'Subscriber' );
				$subscribers = get_users( $args );

				if ( !empty( $subscribers ) ) {
					require_once( ABSPATH . 'wp-admin/includes/user.php' );
					$i = 0;
					foreach ( $subscribers as $subscriber ) {
						$userid		 = $subscriber->ID;
						$user_info			 = get_userdata( $userid );
						$first_name	 = $user_info->first_name;
						if ( $first_name == '' ) {
							
							if ( wp_delete_user( $userid ) ) {
								$i++;
							}
						}
					}
					echo $i . ' Subscribers deleted';
				} else {
					echo 'No Subscribers deleted';
				}
			}

			
			remove_subscribers();