Revert of Prototype of RAW decoding in Skia. (patchset #32 id:610001 of https://coder...

Revert of Prototype of RAW decoding in Skia. (patchset #32 id:610001 of https://codereview.chromium.org/1520403003/ )

Reason for revert:
A few build failures on Chrome OS/Android.

Original issue's description:
> Add RAW decoding into Skia.
>
> TBR=reed@google.com
>
> BUG=skia:
>
> (Based on the work from ebrauer in https://codereview.chromium.org/1459473007)
> (Based on the work from adaubert in https://codereview.chromium.org/1494003003)
> GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1520403003
>
> Committed: https://skia.googlesource.com/skia/+/6bd8639f8c142eedf543f4e5f3b02d2bf11df308

TBR=scroggo@google.com,adaubert@google.com,yujieqin@google.com
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=skia:

Review URL: https://codereview.chromium.org/1635443002