don't try to format removed files

Let's spin this off in case (dare I say it) the other CL is reverted.

Change-Id: I8ae978cd82772b418f7aae5a64cc8c0fd066ddb9
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/230443
Reviewed-by: Greg Daniel <egdaniel@google.com>
Commit-Queue: Mike Klein <mtklein@google.com>
1 file changed