How to Hide GDPR Compliance & Cookie Consent Admin Menus

function plt_hide_gdpr_compliance_cookie_consent_menus() {
	//Hide the "GDPR" menu.
	remove_menu_page('gdpr-compliance-cookie-consent');
}

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

Where do I put this code?