Tips on Customizing JM Breaking News

How to Hide JM Breaking News Admin Menus

function plt_hide_jm_breaking_news_menus() {
	//Hide the "Breaking News" menu.
	remove_menu_page('edit.php?post_type=jm_breaking_news');
	//Hide the "Breaking News → All Breaking News Items" menu.
	remove_submenu_page('edit.php?post_type=jm_breaking_news', 'edit.php?post_type=jm_breaking_news');
	//Hide the "Breaking News → Add New" menu.
	remove_submenu_page('edit.php?post_type=jm_breaking_news', 'post-new.php?post_type=jm_breaking_news');
}

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

Where do I put this code?

How to Hide the "Breaking News Info" Meta Box

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

	//Hide the "Breaking News Info" meta box.
	remove_meta_box('jm-breaking-news-meta', $screen->id, 'normal');
}

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