remove (dead) legacy measuretext

Bug: skia:
Change-Id: I3deed21a9e4a019f87557f751fafdcc36c95fa57
Reviewed-on: https://skia-review.googlesource.com/c/188312
Reviewed-by: Mike Reed <reed@google.com>
Commit-Queue: Mike Reed <reed@google.com>
Auto-Submit: Mike Reed <reed@google.com>
2 files changed