uninstall.php

<?php
/**
 * Uninstall AMP For wp
 *
 */// if uninstall.php is not called by WordPress, die
if ( ! defined('WP_UNINSTALL_PLUGIN') ) {

    die;

}

$options = get_option( 'pwaforwp_settings' );  

if ( isset( $options['pwa_uninstall_data'] ) && 1 == $options['pwa_uninstall_data'] ) {

	if ( is_multisite() ) {

		delete_site_option( 'pwaforwp_settings' );
		delete_site_option( 'pwaforwp_pre_cache_post_ids' );
		delete_site_option( 'pwaforwp_update_pre_cache_list' );
		delete_site_option( 'pwaforwp_admin_notice_transient' );
		delete_site_option( 'pwaforwp_review_never' );
		delete_site_option( 'pwaforwp_activation_date' );
		delete_site_option( '_transient_pwaforwp_restapi_check' );
		delete_site_option( 'pwaforwp_review_notice_bar_close_date' );
		delete_site_option( 'pwa_token_list' );
		delete_site_option( 'pwa_uninstall_data' );

	} else {

		delete_option( "pwaforwp_settings" );
		delete_option( "pwaforwp_pre_cache_post_ids" );
		delete_option( "pwaforwp_update_pre_cache_list" );
		delete_option( "pwaforwp_admin_notice_transient" );
		delete_option( "pwaforwp_review_never" );
		delete_option( "pwaforwp_activation_date" );
		delete_option( "_transient_pwaforwp_restapi_check" );
		delete_option( 'pwaforwp_review_notice_bar_close_date' );
		delete_option( 'pwa_token_list' );
		delete_option( 'pwa_uninstall_data' );
	}

	global $wp_filesystem;

	if ( ! function_exists( 'WP_Filesystem' ) ) {
		require_once ABSPATH . '/wp-admin/includes/file.php';
	}

	if ( isset( $wp_filesystem ) ) {
		// deleting manifest file
		if ( $wp_filesystem->is_file( ABSPATH.'pwa-manifest.json' ) ) {

			$wp_filesystem->delete( ABSPATH.'pwa-manifest.json' );

		}
		// deleting service worker file
		if ( $wp_filesystem->is_file( ABSPATH.'pwa-sw.js' ) ) {

			$wp_filesystem->delete( ABSPATH.'pwa-sw.js' );

		}

		if ( $wp_filesystem->is_file( ABSPATH.'pwa-register-sw.js' ) ) {
			
			$wp_filesystem->delete( ABSPATH.'pwa-register-sw.js' );

		}
	}
}