uninstall.php

<?php

if ( ! defined( 'WP_UNINSTALL_PLUGIN' ) ) exit;

global $wp_filesystem;

ob_start();

if ( file_exists( WP_CONTENT_DIR . '/object-cache.php' ) && method_exists( $GLOBALS[ 'wp_object_cache' ], 'redis_status' ) ) {

	if ( WP_Filesystem( request_filesystem_credentials( '' ) ) ) {
		$wp_filesystem->delete( WP_CONTENT_DIR . '/object-cache.php' );
	}

}

ob_end_clean();