triv: removed not existing maps from css files

[mihalikv]

Description

Just dummy fix by removing maps from files.

Related resources

• Missing style map file cause fail of ManifestStaticFilesStorage  #1381

Checklist

• I have opened this pull request against master
• I have added or modified the tests when changing logic
• I have followed the conventional commits guidelines to add meaningful information into the changelog
• I have read the contribution guidelines and I have joined #workgroup-pr-review on
  Slack to find a “pr review buddy” who is going to review my pull request.

[fsbraun]

Solved by #1383

[fsbraun]

@mihalikv Thank you very much for this PR!
I closed it, since I fixed the issue by adding the missing map files instead. I could not have done it without you pointing out the issue in the first place!!