edit prediction: Do not attempt to gather context for non-zeta2 models (#43943)

We were running the LLM-based context gathering for zeta1 and sweep
which don't use it.

Release Notes:

- N/A
26f77032a2Agus Zubiaga committed on 12/1/2025, 9:14:00 PM· committed by GitHubparentefff602
1 file changedLine totals unavailable