gm: image-surface: stop looking for nonexistant file

Change-Id: Iaac032f96b47901effb303cd99be15145c66fae1
Reviewed-on: https://skia-review.googlesource.com/84500
Reviewed-by: Hal Canary <halcanary@google.com>
Commit-Queue: Hal Canary <halcanary@google.com>
1 file changed