Tips on Customizing WP Link Bio

How to Hide WP Link Bio Admin Menus

function plt_hide_wp_link_bio_menus() {
	//Hide "WP Link Bio".
	remove_menu_page('edit.php?post_type=wp-link-bio');
	//Hide "WP Link Bio → All Links".
	remove_submenu_page('edit.php?post_type=wp-link-bio', 'edit.php?post_type=wp-link-bio');
	//Hide "WP Link Bio → Add New Link".
	remove_submenu_page('edit.php?post_type=wp-link-bio', 'post-new.php?post_type=wp-link-bio');
	//Hide "WP Link Bio → Settings".
	remove_submenu_page('edit.php?post_type=wp-link-bio', 'wp-link-bio');
	//Hide "WP Link Bio → Contact Us".
	remove_submenu_page('edit.php?post_type=wp-link-bio', 'wp-link-bio-contact');
	//Hide "WP Link Bio → Support Forum".
	remove_submenu_page('edit.php?post_type=wp-link-bio', 'wp-link-bio-wp-support-forum');
	//Hide "WP Link Bio → Upgrade".
	remove_submenu_page('edit.php?post_type=wp-link-bio', 'wp-link-bio-pricing');
}

add_action('admin_menu', 'plt_hide_wp_link_bio_menus', 1000000000);

Where do I put this code?

How to Hide the "Link Attributes" Meta Box

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

	//Hide the "Link Attributes" meta box.
	remove_meta_box('wplb-meta-box-for-links', $screen->id, 'normal');
}

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