Tips on Customizing WP Voting Contest Lite

How to Hide WP Voting Contest Lite Admin Menus

function plt_hide_wp_voting_contest_menus() {
	//Hide "Dashboard →".
	remove_submenu_page('index.php', 'votes-setup');

	//Hide "Contest".
	remove_menu_page('contestants');
	//Hide "Contest → Overview".
	remove_submenu_page('contestants', 'contestants');
	//Hide "Contest → Contest Category".
	remove_submenu_page('contestants', 'wpvc_category');
	//Hide "Contest → Contestants".
	remove_submenu_page('contestants', 'edit.php?post_type=contestants');
	//Hide "Contest → Custom Fields".
	remove_submenu_page('contestants', 'wpvc_custom_fields');
	//Hide "Contest → Settings".
	remove_submenu_page('contestants', 'wpvc_settings');
	//Hide "Contest → Upgrade to PRO".
	remove_submenu_page('contestants', 'wpvc_upgrade');
}

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

Where do I put this code?

How to Hide WP Voting Contest Lite Meta Boxes

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

	//Hide the "Contest Category" meta box.
	remove_meta_box('votescategory', $screen->id, 'side');
	//Hide the "Votes For this Contestant" meta box.
	remove_meta_box('votesstatus', $screen->id, 'normal');
	//Hide the "Custom Fields" meta box.
	remove_meta_box('votecustomfields', $screen->id, 'normal');
}

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