Revert "Add filled occluders to shadow_utils GM"

Revert "Add filled occluders to shadow_utils GM"

This reverts commit 737169965fa97e4c71f2a625315b732969d00264.

Reason for revert: <INSERT REASONING HERE>

Original change's description:
> Add filled occluders to shadow_utils GM
>
> Change-Id: I70a927261b6530d2352d8d5a713b309aa518e6b0
> Reviewed-on: https://skia-review.googlesource.com/16545
> Commit-Queue: Jim Van Verth <jvanverth@google.com>
> Reviewed-by: Mike Reed <reed@google.com>
> Reviewed-by: Brian Salomon <bsalomon@google.com>
>

TBR=jvanverth@google.com,bsalomon@google.com,reed@google.com
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true

Change-Id: If1d71118c781cdc4065187ed4953f42a1acad0f3
Reviewed-on: https://skia-review.googlesource.com/16706
Reviewed-by: Jim Van Verth <jvanverth@google.com>
Commit-Queue: Jim Van Verth <jvanverth@google.com>