Revert of Add support for NEON intrinsics to speed up texture compression. We can (https://codereview.chromium.org/390453002/)

Reason for revert:
Breaking chrome.

Original issue's description:
> Add support for NEON intrinsics to speed up texture compression. We can
> now convert the time that we would have spent uploading the texture to
> compressing it giving a net 50% memory savings for these things.
>
> Committed: https://skia.googlesource.com/skia/+/bc9205be0a1094e312da098348601398c210dc5a

R=robertphillips@google.com, mtklein@google.com, kevin.petit@arm.com
TBR=kevin.petit@arm.com, mtklein@google.com, robertphillips@google.com
NOTREECHECKS=true
NOTRY=true

Author: krajcevski@google.com

Review URL: https://codereview.chromium.org/384053003
7 files changed