How to Hide BSK PDF Manager Admin Menus

function plt_hide_bsk_pdf_manager_menus() {
	//Hide "BSK PDF Mngr".
	remove_menu_page('bsk-pdf-manager');
	//Hide "BSK PDF Mngr → PDF / Documents".
	remove_submenu_page('bsk-pdf-manager', 'bsk-pdf-manager');
	//Hide "BSK PDF Mngr → Add New / Edit".
	remove_submenu_page('bsk-pdf-manager', 'bsk-pdf-manager-edit');
	//Hide "BSK PDF Mngr → Add by FTP".
	remove_submenu_page('bsk-pdf-manager', 'bsk-pdf-manager-add-by-ftp');
	//Hide "BSK PDF Mngr → Add by Media Library".
	remove_submenu_page('bsk-pdf-manager', 'bsk-pdf-manager-add-by-media-library');
	//Hide "BSK PDF Mngr → Categories".
	remove_submenu_page('bsk-pdf-manager', 'bsk-pdf-manager-category');
	//Hide "BSK PDF Mngr → Tags".
	remove_submenu_page('bsk-pdf-manager', 'bsk-pdfm-tag');
	//Hide "BSK PDF Mngr → Notifications".
	remove_submenu_page('bsk-pdf-manager', 'bsk-pdfm-notification');
	//Hide "BSK PDF Mngr → Settings".
	remove_submenu_page('bsk-pdf-manager', 'bsk-pdf-manager-settings-support');
	//Hide "BSK PDF Mngr → Migrate".
	remove_submenu_page('bsk-pdf-manager', 'bsk-pdfm-migrate');
}

add_action('admin_menu', 'plt_hide_bsk_pdf_manager_menus', 11);
Where do I put this code?