Revert of Update SK_IMAGE_VERSION to test RAW (patchset #1 id:1 of https://codereview...

Revert of Update SK_IMAGE_VERSION to test RAW (patchset #1 id:1 of https://codereview.chromium.org/1612113002/ )

Reason for revert:
https://skia.googlesource.com/skia/+/7579786f3bd5a8fda84a1abc45b16213c3371f93 seems to have caused problems, but it allows us to test RAW. In order to reland this, we'll need to reland that one, or have a simpler fix to disable RAW on platforms where it's not supported (e.g. ChromeOS)

Original issue's description:
> Update SK_IMAGE_VERSION to test RAW
>
> Once https://codereview.chromium.org/1520403003/ lands, we can start
> testing RAW images. I have already added RAW images to a folder named
> v2/; this updates the version so the script (once written) will check
> the new version.
>
> Depends on skbug.com/4558
>
> BUG=skia:4829
> GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1612113002
>
> Committed: https://skia.googlesource.com/skia/+/317a45e879889f9ed876549a10bbfd51aab41b45

TBR=borenet@google.com,msarett@google.com
# Not skipping CQ checks because original CL landed more than 1 days ago.

# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=skia:4829

Review URL: https://codereview.chromium.org/1651603004