remove SK_SUPPORT_LEGACY_NESTED_HINTINGENUM code

Bug: skia:
Change-Id: Idc44f02fab691881e1c1a409adc8641663401732
Reviewed-on: https://skia-review.googlesource.com/c/173432
Reviewed-by: Mike Reed <reed@google.com>
Commit-Queue: Mike Reed <reed@google.com>
2 files changed