How to Hide Page and Post Description Admin Menus and Meta Boxes - PluginTests.com

How to Hide the "Page and Post Description" Admin Menu

function plt_hide_page_and_post_description_menus() {
	//Hide the "Settings → Page and Post Description" menu.
	remove_submenu_page('options-general.php', 'page-and-post-description/options.php');
}

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

Where do I put this code?

How to Hide the "Description" Meta Box

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

	//Hide the "Description" meta box.
	remove_meta_box('PageAndPostDescription_MetaField', $screen->id, 'advanced');
}

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