Remove command_palette feature flag
What does this MR do and why?
The feature flag has been enabled per default since 16.2. It works properly and we relying more and more on the functionality of the command palette. Let's remove the alternate code path.
Changelog: other
Screenshots or screen recordings
N/A
How to set up and validate locally
- Use the new navigation and click the "Search or go to" button
- Everything should still work
MR acceptance checklist
This checklist encourages us to confirm any changes have been analyzed to reduce risks in quality, performance, reliability, security, and maintainability.
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I have evaluated the MR acceptance checklist for this MR.
Edited by Lukas Eipert