I had a problem with activating / deactivating plug-in modules

I found a problem. As known in WordPress 4.4, RESTAPI and the wp-json/oembed virtual directory appeared, which created unnecessary pages with search engine indexing. To fix this problem, I added code to the functions.php file. This code created a problem in the work of your plugin.
I will write you an additional email and attach this code.
Please tell me how today the problem is solved with unnecessary pages created in the wp-json/oembed virtual directory?
Thank you very much!

I saw that the code can be added here, here it is:

<?php
// функция php сверху нужна для functions.php, её копировать не надо!

// Отключение rss ленты
function fb_disable_feed() {
wp_redirect(get_option('siteurl'));
}

add_action('do_feed', 'fb_disable_feed', 1);
add_action('do_feed_rdf', 'fb_disable_feed', 1);
add_action('do_feed_rss', 'fb_disable_feed', 1);
add_action('do_feed_rss2', 'fb_disable_feed', 1);
add_action('do_feed_atom', 'fb_disable_feed', 1);

remove_action( 'wp_head', 'feed_links_extra', 3 );
remove_action( 'wp_head', 'feed_links', 2 );
remove_action( 'wp_head', 'rsd_link' );

// Отключаем сам REST API
add_filter('rest_enabled', '__return_false');

// Отключаем события REST API
remove_action( 'init', 'rest_api_init' );
remove_action( 'rest_api_init', 'rest_api_default_filters', 10, 1 );
remove_action( 'parse_request', 'rest_api_loaded' );

// Отключаем Embeds связанные с REST API
remove_action( 'rest_api_init', 'wp_oembed_register_route' );
remove_filter( 'rest_pre_serve_request', '_oembed_rest_pre_serve_request', 10, 4 );

// Отключаем фильтры REST API
remove_action( 'xmlrpc_rsd_apis', 'rest_output_rsd' );
remove_action( 'wp_head', 'rest_output_link_wp_head', 10, 0 );
remove_action( 'template_redirect', 'rest_output_link_header', 11, 0 );
remove_action( 'auth_cookie_malformed', 'rest_cookie_collect_status' );
remove_action( 'auth_cookie_expired', 'rest_cookie_collect_status' );
remove_action( 'auth_cookie_bad_username', 'rest_cookie_collect_status' );
remove_action( 'auth_cookie_bad_hash', 'rest_cookie_collect_status' );
remove_action( 'auth_cookie_valid', 'rest_cookie_collect_status' );
remove_filter( 'rest_authentication_errors', 'rest_cookie_check_errors', 100 );

//Отключаем type="application/json+oembed"
remove_action( 'wp_head', 'wp_oembed_add_discovery_links' );
remove_action( 'wp_head', 'rest_output_link_wp_head' );
remove_action( 'template_redirect', 'rest_output_link_header', 11, 0 );

// Отключаем wp-emoji
remove_action('wp_head', 'print_emoji_detection_script', 7);
remove_action('wp_print_styles', 'print_emoji_styles');