Disable recipe roller until mac XCode update failure is fixed

The update of xcode on x64 macs is failing, so the update
is reverted in depot_tools.
https://chromium-review.googlesource.com/c/chromium/tools/depot_tools/+/5428612

Stop the roller so they can reland this without our bots breaking.

Change-Id: I798e93301c201045837c7bb4732f84532366e658
Reviewed-on: https://dart-review.googlesource.com/c/recipes/+/361344
Reviewed-by: Alexander Thomas <athom@google.com>
Commit-Queue: Alexander Thomas <athom@google.com>
1 file changed