zeta2: Remove `experimental_edit_prediction_context_retrieval` setting (#47783)

Closes #ISSUE

Release Notes:

- N/A *or* Added/Fixed/Improved ...
07e675db7bBen Kunkle committed on 1/27/2026, 5:10:08 PM· committed by GitHubparent41ce23f
5 files changedLine totals unavailable