Remove V1/V2 compile bots

This, basically, reverts:

https://skia-review.googlesource.com/c/skia/+/426556 (Add V1 & V2 build bots)

Change-Id: Ib5584992008f1bcce8dfcdb9b29322b35599ab40
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/467758
Reviewed-by: Eric Boren <borenet@google.com>
Commit-Queue: Robert Phillips <robertphillips@google.com>
8 files changed