Remove getDevice_just_for_deprecated_compatibility_test()

BUG=skia:6067

Change-Id: I646e75f43bc77ea884b7fad7281bf0b684996bb9
Reviewed-on: https://skia-review.googlesource.com/6299
Reviewed-by: Mike Reed <reed@google.com>
Commit-Queue: Robert Phillips <robertphillips@google.com>
7 files changed