Reverts #50420

This was made redundant by
https://github.com/zed-industries/zed/pull/50783.

According to [this
comment](https://github.com/zed-industries/zed/pull/50783#issuecomment-4002827488),
the ctrl-enter keybind from the `Editor && mode == auto_height` context
applies to the search bars now.

Release Notes:

- N/A