Revert "Add unit test confirming Runtime Blends match native blends."

This reverts commit 0b62a05d9ae528fad7b18e842588b331ec032bcd.

Reason for revert: GetRuntimeBlendForBlendMode not found in google3

Does the new file that contains that not appear in google3's build?

Original change's description:
> Add unit test confirming Runtime Blends match native blends.
>
> We perform the same draw operation twice--once with a `setBlendMode`
> based blend, and then once more with `setBlender` and passing SkSL which
> is equivalent to the native blend op. If this test fails, it would
> indicate that Runtime Blends aren't being applied appropriately (or
> perhaps that a GPU's built-in blending modes are cutting corners?).
>
> Change-Id: I4ca1f9ed600d9ec733687cc6de7d3e2eb6e765c9
> Bug: skia:12080
> Reviewed-on: https://skia-review.googlesource.com/c/skia/+/428318
> Auto-Submit: John Stiles <johnstiles@google.com>
> Reviewed-by: Mike Reed <reed@google.com>
> Commit-Queue: John Stiles <johnstiles@google.com>

TBR=brianosman@google.com,reed@google.com,johnstiles@google.com

Change-Id: Idd5ca97cfc4b642d3f97fdbd1fe9bd108b56e3a6
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: skia:12080
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/428617
Reviewed-by: Mike Reed <reed@google.com>
2 files changed