Revert "Avoid non-indexed quad draws on PowerVR Rogue and 54x"

This reverts commit b149700e019a794c4b0c1ab852a12ca7a5acdf7e.

Reason for revert: This was a speculative fix that didn't pan out.

Original change's description:
> Avoid non-indexed quad draws on PowerVR Rogue and 54x
>
> Bug: chromium:1203652
> Change-Id: Id83ac81c40eda2653e97a7c8ae9326c273f0f00b
> Reviewed-on: https://skia-review.googlesource.com/c/skia/+/420537
> Reviewed-by: Michael Ludwig <michaelludwig@google.com>
> Commit-Queue: Brian Salomon <bsalomon@google.com>

# Not skipping CQ checks because original CL landed > 1 day ago.

Bug: chromium:1203652
Change-Id: I73f2415e35d92514229572f2d8823c1a632a68fa
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/421921
Reviewed-by: Brian Salomon <bsalomon@google.com>
Commit-Queue: Brian Salomon <bsalomon@google.com>