agent_ui: Remove custom "unavailable editing" tooltip (#44992)

Now that we can use `Tooltip::element`, we don't need a separate
file/component just for this.

Release Notes:

- N/A
37e4f7e9b5Danilo Leal committed on 12/16/2025, 1:50:52 PM· committed by GitHubparent5f451c8
3 files changedLine totals unavailable