Remove support for changing magnification of active pane (#31981)

Closes #4265
Closes #24600

This setting causes many visual defects, and introduces unnecessary
(maintenance) complexity. as seen by #4265 and #24600


CC: @iamnbutler - How do you feel about this? I recommend looking at
https://github.com/zed-industries/zed/pull/24150#issuecomment-2866706506
for more context

Release Notes:

- Removed support

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Co-authored-by: Peter <peter@zed.dev>
29cb95a3caBen Kunkle committed on 6/3/2025, 5:32:32 PM· committed by GitHubparent1307b81
5 files changedLine totals unavailable