Every browser lets you view, block and delete cookies and site data. These controls are usually under your browser’s privacy or site-permissions settings.
For this site the only thing there is to delete is your language preference. Clearing your browser’s site data removes it, and on your next visit the site works the language out from your browser’s settings again. Nothing on the site stops working.
If you want to block cookies from the Google Maps frame, your browser’s third-party cookie settings will do it. With the map blocked, the address and the “Get directions” link on the Contact page still work.