Revert of enable conics gm (patchset #3 id:40001 of https://codereview.chromium.org/835593002/)

Reason for revert:
did I break the build?

Original issue's description:
> enable conics gm
>
> BUG=skia:
> TBR=
>
> Committed: https://skia.googlesource.com/skia/+/03119ba4f815bc2c2774a9349ca8278ab1695072

TBR=egdaniel@google.com
NOTREECHECKS=true
NOTRY=true
BUG=skia:

Review URL: https://codereview.chromium.org/811863006
3 files changed