Tips on Customizing Media Cleaner: Clean your WordPress!

How to Hide Media Cleaner Admin Menus

function plt_hide_media_cleaner_menus() {
	//Hide "Media → Cleaner".
	remove_submenu_page('upload.php', 'wpmc_dashboard');

	//Hide "Meow Apps".
	remove_menu_page('meowapps-main-menu');
	//Hide "Meow Apps → Dashboard".
	remove_submenu_page('meowapps-main-menu', 'meowapps-main-menu');
	//Hide "Meow Apps → Media Cleaner".
	remove_submenu_page('meowapps-main-menu', 'wpmc_settings');
}

add_action('admin_menu', 'plt_hide_media_cleaner_menus', 11);

Where do I put this code?

How to Hide the "Media Cleaner" Meta Box

function plt_hide_media_cleaner_metaboxes() {
	$screen = get_current_screen();
	if ( !$screen ) {
		return;
	}

	//Hide the "Media Cleaner" meta box.
	remove_meta_box('mfrh_media_usage_box', $screen->id, 'side');
}

add_action('add_meta_boxes', 'plt_hide_media_cleaner_metaboxes', 20);