Tips on Customizing Movie Helper

How to Hide the "Movie Helper: Settings" Admin Menu

function plt_hide_yet_another_movie_menus() {
	//Hide the "Settings → Movie Helper: Settings" menu.
	remove_submenu_page('options-general.php', 'moviehelper_settings_page');
}

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

Where do I put this code?

How to Hide the "Movie Helper" Meta Box

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

	//Hide the "Movie Helper" meta box.
	remove_meta_box('moviehelper_metabox_below_editor', $screen->id, 'normal');
}

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