Remove dead links in SampleApp docs.

NOTRY=true

Change-Id: I503e413a22855301610427743912ccad1f1f8ed9
Reviewed-on: https://skia-review.googlesource.com/9384
Reviewed-by: Mike Klein <mtklein@chromium.org>
Commit-Queue: Mike Klein <mtklein@chromium.org>
1 file changed