Tips on Customizing Reviews Carousel

How to Hide Reviews Carousel Admin Menus

function plt_hide_reviews_carousel_menus() {
	//Hide "Reviews".
	remove_menu_page('edit.php?post_type=revica_review');
	//Hide "Reviews → Reviews".
	remove_submenu_page('edit.php?post_type=revica_review', 'edit.php?post_type=revica_review');
	//Hide "Reviews → Add New Post".
	remove_submenu_page('edit.php?post_type=revica_review', 'post-new.php?post_type=revica_review');
	//Hide "Reviews → Carousel Settings".
	remove_submenu_page('edit.php?post_type=revica_review', 'revica_settings');
}

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

Where do I put this code?

How to Hide the "Upload Review Media" Meta Box

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

	//Hide the "Upload Review Media" meta box.
	remove_meta_box('revica_media_meta_box', $screen->id, 'normal');
}

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