SkPDF: remove unused function

Change-Id: Ic5c23ec231acad43ee49eb7854373d7be090c101
Reviewed-on: https://skia-review.googlesource.com/157180
Commit-Queue: Ben Wagner <bungeman@google.com>
Auto-Submit: Hal Canary <halcanary@google.com>
Reviewed-by: Ben Wagner <bungeman@google.com>
1 file changed