remove code for TextDecorations

BUG=skia:6250

Change-Id: I8c67c69017e0514b09f4583f5f2f9d16dec4f830
Reviewed-on: https://skia-review.googlesource.com/8497
Reviewed-by: Ben Wagner <bungeman@google.com>
Commit-Queue: Mike Reed <reed@google.com>
2 files changed