remove dead code around SK_SUPPORT_LEGACY_FONT_FLAGS

Bug: skia:
Change-Id: I5a36e6827610c2a429e2f8b36adf432b95993c54
Reviewed-on: https://skia-review.googlesource.com/c/171529
Reviewed-by: Mike Reed <reed@google.com>
Commit-Queue: Mike Reed <reed@google.com>
2 files changed