Revert "we now cache GLSL shaders when we can't cache the binaries"

This reverts commit 830d5c032cb35f9cdb438348715c3b4c83e8280e.

Reason for revert: probably responsible for Google3 roll failure

Original change's description:
> we now cache GLSL shaders when we can't cache the binaries
> 
> Bug: skia:
> Change-Id: I56552049c141cbd69fa6b55653e38820d541bf2f
> Reviewed-on: https://skia-review.googlesource.com/c/176976
> Reviewed-by: Brian Salomon <bsalomon@google.com>
> Commit-Queue: Ethan Nicholas <ethannicholas@google.com>

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

Change-Id: Ie5460993800441eee0171e149e4d0d86cc7e87f4
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: skia:
Reviewed-on: https://skia-review.googlesource.com/c/177071
Reviewed-by: Ethan Nicholas <ethannicholas@google.com>
Commit-Queue: Ethan Nicholas <ethannicholas@google.com>
2 files changed