Revert "Use explicit samplingoptions"

This reverts commit 8b5f3ac3eb1ed6c2f001b17d36d0250fd7cd5a13.

Reason for revert: unexpected gm changes

Original change's description:
> Use explicit samplingoptions
>
> Promoting pictureshader to linear by default
>
> Change-Id: Icd4102c3eee47558ecec845d0581ddbded981ef8
> Reviewed-on: https://skia-review.googlesource.com/c/skia/+/341979
> Commit-Queue: Mike Reed <reed@google.com>
> Reviewed-by: Florin Malita <fmalita@chromium.org>

TBR=fmalita@chromium.org,reed@google.com

Change-Id: I773b6cfd04681619283b4e879468720706d2c9fd
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/342377
Reviewed-by: Mike Reed <reed@google.com>
16 files changed