remove __ARM_FEATURE_CRC32 workaround

Just noticed that this is no longer set for -arch arm64
(but is, correctly, for -arch arm64e).

Change-Id: I607bb052ce67f91186852156d832d97eed33788b
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/313239
Reviewed-by: Herb Derby <herb@google.com>
Commit-Queue: Mike Klein <mtklein@google.com>
1 file changed