Revert of skpbench: add option for gpu timing (patchset #7 id:120001 of https://codereview.chromium.org/2388433003/ )

Reason for revert:
many bots failing

Original issue's description:
> skpbench: add option for gpu timing
>
> Adds a gpu timing option with a GL implementation.
>
> BUG=skia:
> GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2388433003
>
> Committed: https://skia.googlesource.com/skia/+/c06720d06faab3b01eba1b8693e0ac791f06dc96

TBR=egdaniel@google.com,bsalomon@google.com,csmartdalton@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/2390383002
9 files changed