Tips on Customizing Logo Carousel Slider

How to Hide Logo Carousel Slider Admin Menus

function plt_hide_logo_carousel_slider_menus() {
	//Hide "Logo Carousel".
	remove_menu_page('edit.php?post_type=logocarousel');
	//Hide "Logo Carousel → All Logos".
	remove_submenu_page('edit.php?post_type=logocarousel', 'edit.php?post_type=logocarousel');
	//Hide "Logo Carousel → Add New Logo".
	remove_submenu_page('edit.php?post_type=logocarousel', 'post-new.php?post_type=logocarousel');
	//Hide "Logo Carousel → Settings".
	remove_submenu_page('edit.php?post_type=logocarousel', 'settings');
	//Hide "Logo Carousel → Usage & Support".
	remove_submenu_page('edit.php?post_type=logocarousel', 'lsc_usage_support');
}

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

Where do I put this code?

How to Hide Logo Carousel Slider Meta Boxes

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

	//Hide the "Logo" meta box.
	remove_meta_box('postimagediv', $screen->id, 'normal');
	//Hide the "URL (Optional)" meta box.
	remove_meta_box('lcs_metabox', $screen->id, 'normal');
}

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