[fiddle] Remove duplicate skia checkout from fiddler's release
[fiddle] Remove duplicate skia checkout from fiddler's release

This caused the build to slow down.

Bug: skia:12816
Change-Id: Ic954977a000de38a6877bfb36f7dd42dae4e370e
Reviewed-on: https://skia-review.googlesource.com/c/buildbot/+/494217
Reviewed-by: Leandro Lovisolo <f558143c2568be8d55575d13f30a1fc5cb8009d5@google.com>
Commit-Queue: Ravi Mistry <9fa2e7438b8cb730f96b74865492597170561628@google.com>

google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot