Remove email laptop google?

I need help and although can someone say how I can remove this email?

You mean from the list? With the DEL / DEL button.
However, it will still be saved in the browser / under the access data for this page.
The saved access data can be found in the settings of your browser.

How do I get there?

Since I do not know which browser you use etc. Should you just google it for a while.

Firefox

Extras / Settings / Privacy & Security / Saved Access Data