Remove D3D12X.

Causing flutter roll issues and we don't need it.

Bug: skia:10105
Change-Id: I2f0ec916984b33045fcd1961417b823f97355725
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/281717
Commit-Queue: Jim Van Verth <jvanverth@google.com>
Auto-Submit: Jim Van Verth <jvanverth@google.com>
Reviewed-by: Ravi Mistry <rmistry@google.com>
4 files changed