Revert "Support multiple image filters in SaveLayerRec"

This reverts commit 7a97b766b14bc1d839643b9edd71a7b56ac14718.

Reason for revert: Fuzzer bug - abundance of caution

Original change's description:
> Support multiple image filters in SaveLayerRec
>
> The new API tries to match the WHATWG spec behavior: the layer contents
> are rendered once, then filtered and composited (using the layer's
> paint) in order.
>
> Bug: chromium:1418141
> Change-Id: Ia67f11ab622831d7f968bfa364fe54226b5d1d8c
> Reviewed-on: https://skia-review.googlesource.com/c/skia/+/784549
> Commit-Queue: Brian Osman <brianosman@google.com>
> Reviewed-by: Michael Ludwig <michaelludwig@google.com>

Bug: chromium:1418141
Change-Id: I18ee6f9f84023913f8e4e47ba15d78d9691dcdff
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/790339
Commit-Queue: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Bot-Commit: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Auto-Submit: Brian Osman <brianosman@google.com>
15 files changed