How to Hide Web Directory Free Admin Menus

function plt_hide_web_directory_free_menus() {
	//Hide "Appearance → Directory settings".
	remove_submenu_page('themes.php', 'w2dc_settings');

	//Hide "Search Forms".
	remove_menu_page('edit.php?post_type=wcsearch_form');
	//Hide "Search Forms → Search Forms".
	remove_submenu_page('edit.php?post_type=wcsearch_form', 'edit.php?post_type=wcsearch_form');
	//Hide "Search Forms → Create new search form".
	remove_submenu_page('edit.php?post_type=wcsearch_form', 'post-new.php?post_type=wcsearch_form');

	//Hide "Directory listings".
	remove_menu_page('edit.php?post_type=w2dc_listing');
	//Hide "Directory listings → Directory listings".
	remove_submenu_page('edit.php?post_type=w2dc_listing', 'edit.php?post_type=w2dc_listing');
	//Hide "Directory listings → Create new listing".
	remove_submenu_page('edit.php?post_type=w2dc_listing', 'post-new.php?post_type=w2dc_listing');
	//Hide "Directory listings → Directory categories".
	remove_submenu_page('edit.php?post_type=w2dc_listing', 'edit-tags.php?taxonomy=w2dc-category&post_type=w2dc_listing');
	//Hide "Directory listings → Directory locations".
	remove_submenu_page('edit.php?post_type=w2dc_listing', 'edit-tags.php?taxonomy=w2dc-location&post_type=w2dc_listing');
	//Hide "Directory listings → Directory tags".
	remove_submenu_page('edit.php?post_type=w2dc_listing', 'edit-tags.php?taxonomy=w2dc-tag&post_type=w2dc_listing');

	//Hide "Directory Admin".
	remove_menu_page('w2dc_settings');
	//Hide "Directory Admin → Directory settings".
	remove_submenu_page('w2dc_settings', 'w2dc_settings');
	//Hide "Directory Admin → Listings levels".
	remove_submenu_page('w2dc_settings', 'w2dc_levels');
	//Hide "Directory Admin → Listings upgrade".
	remove_submenu_page('w2dc_settings', 'w2dc_manage_upgrades');
	//Hide "Directory Admin → Locations levels".
	remove_submenu_page('w2dc_settings', 'w2dc_locations_levels');
	//Hide "Directory Admin → Content fields".
	remove_submenu_page('w2dc_settings', 'w2dc_content_fields');
	//Hide "Directory Admin → CSV Import/Export".
	remove_submenu_page('w2dc_settings', 'w2dc_csv_import');
	//Hide "Directory Admin → Demo data Import".
	remove_submenu_page('w2dc_settings', 'w2dc_demo_data');
}

add_action('admin_menu', 'plt_hide_web_directory_free_menus', 12);
Where do I put this code?