Remove isCompatible from GrSurfaceCharacteriziation

It appears to be unused (outside of tests) and has Vulkan-specific
code #ifdef'd in that we wish to remove.

Bug: b/293490566
Change-Id: Ic122e550fec82f5225d51c2531bc6c91a82e70b5
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/784917
Commit-Queue: Kevin Lubick <kjlubick@google.com>
Reviewed-by: Brian Osman <brianosman@google.com>
3 files changed