Tips on Customizing Rock Convert

How to Hide Rock Convert Admin Menus

function plt_hide_rock_convert_menus() {
	//Hide "Rock Convert".
	remove_menu_page('edit.php?post_type=cta');
	//Hide "Rock Convert → All banners".
	remove_submenu_page('edit.php?post_type=cta', 'edit.php?post_type=cta');
	//Hide "Rock Convert → New banner".
	remove_submenu_page('edit.php?post_type=cta', 'post-new.php?post_type=cta');
	//Hide "Rock Convert → Categories".
	remove_submenu_page('edit.php?post_type=cta', 'edit-tags.php?taxonomy=category&post_type=cta');
	//Hide "Rock Convert → Tags".
	remove_submenu_page('edit.php?post_type=cta', 'edit-tags.php?taxonomy=post_tag&post_type=cta');
	//Hide "Rock Convert → Adbar".
	remove_submenu_page('edit.php?post_type=cta', 'rock-convert-announcements');
	//Hide "Rock Convert → Settings".
	remove_submenu_page('edit.php?post_type=cta', 'rock-convert-settings');
	//Hide "Rock Convert → Ajuda".
	remove_submenu_page('edit.php?post_type=cta', 'https://ajuda.rockstage.io/categorias/plugin-de-conversao/');
}

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

Where do I put this code?

How to Hide Rock Convert Meta Boxes

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

	//Hide the "Lead Capture" meta box.
	remove_meta_box('rock-convert-ebook-meta', $screen->id, 'side');
	//Hide the "Select banner image" meta box.
	remove_meta_box('rock_convert_banner', $screen->id, 'normal');
	//Hide the "Banner Settings" meta box.
	remove_meta_box('rock-convert-meta', $screen->id, 'normal');
	//Hide the "Visibility" meta box.
	remove_meta_box('rock-convert-visibility', $screen->id, 'normal');
	//Hide the "Display Categories" meta box.
	remove_meta_box('categorydiv', $screen->id, 'side');
	//Hide the "Display Tags New" meta box.
	remove_meta_box('tagsdiv-post_tag', $screen->id, 'side');
}

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