How to Hide BulkPress Admin Menus

function plt_hide_bulkpress_menus() {
	//Hide "BulkPress".
	remove_menu_page('bulkpress');
	//Hide "BulkPress → BulkPress".
	remove_submenu_page('bulkpress', 'bulkpress');
	//Hide "BulkPress → Terms".
	remove_submenu_page('bulkpress', 'bulkpress-terms');
	//Hide "BulkPress → Posts".
	remove_submenu_page('bulkpress', 'bulkpress-posts');
}

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

Where do I put this code?