fixed for Don't show social links in menu bar #8774

[Css22]

I delete the DOI element directly. That way, it works well on a small screen.
link #8774

• [] Change in CHANGELOG.md described in a way that is understandable for the average user (if applicable)
• Tests created for changes (if applicable)
• Manually tested changed features in running JabRef (always required)
• Screenshots added in PR description (for UI changes)
• Checked developer's documentation: Is the information available and up to date? If not, I outlined it in this pull request.
• [x ] Checked documentation: Is the information available and up to date? If not, I created an issue at https://github.com/JabRef/user-documentation/issues or, even better, I submitted a pull request to the documentation repository.

[calixtus]

Hi @Css22 , thanks for your interest in JabRef development. We saw the corresponding issue and we'll discuss this proposal in the next devcall.