Revert "converted GrSimpleTextureEffect to sksl"

This reverts commit 46b654df9e70bbfacf6dc45d3a2a7ceb13a61edb.

Reason for revert: making Vulkan mad

Original change's description:
> converted GrSimpleTextureEffect to sksl
> 
> Bug: skia:
> Change-Id: If556c6baad75f22135f429759feabaaec095b900
> Reviewed-on: https://skia-review.googlesource.com/21720
> Commit-Queue: Ethan Nicholas <ethannicholas@google.com>
> Reviewed-by: Greg Daniel <egdaniel@google.com>

TBR=egdaniel@google.com,ethannicholas@google.com

Change-Id: I06fac3d106435e1d58e19cc54a919c5d84784d92
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: skia:
Reviewed-on: https://skia-review.googlesource.com/22266
Reviewed-by: Ethan Nicholas <ethannicholas@google.com>
Commit-Queue: Ethan Nicholas <ethannicholas@google.com>
14 files changed