Cleanup `useStimulusBridge` and `stimulus` from features

[Kocal]

While working on the new version of https://github.com/symfony/stimulus-bridge, I noticed some dead code from #1062:

[carsonbot]

Thank you for this issue.
There has not been a lot of activity here for a while. Has this been resolved?

[Kocal]

Nope, keep open