How to Hide a3 Responsive Slider Admin Menus

function plt_hide_a3_responsive_slider_menus() {
	//Hide "Responsive Slider".
	remove_menu_page('edit.php?post_type=a3_slider');
	//Hide "Responsive Slider → All Sliders".
	remove_submenu_page('edit.php?post_type=a3_slider', 'edit.php?post_type=a3_slider');
	//Hide "Responsive Slider → Add New Slider".
	remove_submenu_page('edit.php?post_type=a3_slider', 'post-new.php?post_type=a3_slider');
	//Hide "Responsive Slider → Folders".
	remove_submenu_page('edit.php?post_type=a3_slider', 'edit-tags.php?taxonomy=slider_folder&post_type=a3_slider');
	//Hide "Responsive Slider → Slider Skins".
	remove_submenu_page('edit.php?post_type=a3_slider', 'a3-rslider-skins');
	//Hide "Responsive Slider → Card Skin".
	remove_submenu_page('edit.php?post_type=a3_slider', 'a3-rslider-card-skin');
	//Hide "Responsive Slider → Widget Skin".
	remove_submenu_page('edit.php?post_type=a3_slider', 'a3-rslider-template-widget');
	//Hide "Responsive Slider → Touch Mobile Skin".
	remove_submenu_page('edit.php?post_type=a3_slider', 'a3-rslider-template-mobile');
}

add_action('admin_menu', 'plt_hide_a3_responsive_slider_menus', 11);
Where do I put this code?