If you mean the autofill suggestions section that is visible in your screenshot:
Why do you want to get rid of it? Okay, you find it annoying… but it is one of the core advantages of a password manager, to autofill credentials on the active webpage you’re on.
If you’re on a website without any stored credential in your vault, you won’t see the autofill suggestions.
Since extension version 2026.2.0 you can also just search for something – that also removes the autofill suggestions now (even if you are still on a site with credentials you could autofill).
If that is what you mean, then it is not possible. However, here is a Feature Request that (in part) proposes the ability to collapse the Autofill Suggestions section in the browser extension’s Vault view: