Tips on Customizing Testimonial – Testimonial Slider and Showcase Plugin

How to Hide Testimonial Slider and Showcase Admin Menus

function plt_hide_testimonial_slider_and_showcase_menus() {
	//Hide "Testimonial".
	remove_menu_page('edit.php?post_type=testimonial');
	//Hide "Testimonial → All Testimonials".
	remove_submenu_page('edit.php?post_type=testimonial', 'edit.php?post_type=testimonial');
	//Hide "Testimonial → Add Testimonial".
	remove_submenu_page('edit.php?post_type=testimonial', 'post-new.php?post_type=testimonial');
	//Hide "Testimonial → ShortCode".
	remove_submenu_page('edit.php?post_type=testimonial', 'edit.php?post_type=tss-sc');
	//Hide "Testimonial → Settings".
	remove_submenu_page('edit.php?post_type=testimonial', 'tss_settings');
	//Hide "Testimonial → Get Help".
	remove_submenu_page('edit.php?post_type=testimonial', 'tss_get_help');
}

add_action('admin_menu', 'plt_hide_testimonial_slider_and_showcase_menus', 100);

Where do I put this code?

How to Hide Testimonial Slider and Showcase Meta Boxes

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

	//Hide the "Short Code Generator" meta box.
	remove_meta_box('rt_tss_sc_settings_meta', $screen->id, 'normal');
	//Hide the "Layout Preview" meta box.
	remove_meta_box('rt_tss_sc_preview_meta', $screen->id, 'normal');
	//Hide the "Documentation" meta box.
	remove_meta_box('rt_plugin_tss_sc_pro_information', $screen->id, 'side');
	//Hide the "Testimonials Information" meta box.
	remove_meta_box('tss_meta_information', $screen->id, 'normal');
}

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