Remove SkVM JIT.

In followup CLs, more SkVM functionality will be removed, with
the goal of removing SkVM entirely. This CL begins the process.

Note that this CL doesn't remove everything; classes like
Assembler are left as-is, even though they are no longer used.
It isn't worth disentangling all of the dead code inside the
SkVM class, since all of it will be deleted shortly.

Change-Id: I045965c32c4a944a23196076c82957a120dc884a
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/714639
Commit-Queue: Brian Osman <brianosman@google.com>
Auto-Submit: John Stiles <johnstiles@google.com>
Reviewed-by: Brian Osman <brianosman@google.com>
10 files changed