How to Hide WP Thumbtack Review Slider Admin Menus

function plt_hide_wp_thumbtack_review_slider_menus() {
	//Hide "WP Thumbtack".
	remove_menu_page('wp_thumbtack-reviews');
	//Hide "WP Thumbtack → Review List".
	remove_submenu_page('wp_thumbtack-reviews', 'wp_thumbtack-reviews');
	//Hide "WP Thumbtack → Get Thumbtack Reviews".
	remove_submenu_page('wp_thumbtack-reviews', 'wp_thumbtack-get_thumbtack');
	//Hide "WP Thumbtack → Templates".
	remove_submenu_page('wp_thumbtack-reviews', 'wp_thumbtack-templates_posts');
	//Hide "WP Thumbtack → Go Pro!".
	remove_submenu_page('wp_thumbtack-reviews', 'https://ljapps.com/wp-review-slider-pro/');
}

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

Where do I put this code?