Remove all SK_GPU_V1s from gpu/ganesh

Given the backend they're appearing in, these are definitionally redundant.

Change-Id: I781eb64d890237a3226f43778e1ffa10cf8923e0
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/585962
Commit-Queue: Robert Phillips <robertphillips@google.com>
Reviewed-by: Jim Van Verth <jvanverth@google.com>
9 files changed