Remove unused constant from SkPathRef

I'm not even sure what this was used for, but it's unreferenced now

Change-Id: Ia27d768a4959989ca3dab80c1c658944269977ef
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/841976
Reviewed-by: John Stiles <johnstiles@google.com>
Auto-Submit: Brian Osman <brianosman@google.com>
Commit-Queue: John Stiles <johnstiles@google.com>
Commit-Queue: Brian Osman <brianosman@google.com>
1 file changed