This reverts commit a6909921.

Reason for revert: New tests failing on gpu fyi bot.  anglebug.com/2554

Original change's description:
> GLES1: Renderer (minimal)
> 
> This is the renderer code for GLES1 that delivers basic vertex
> attributes, matrices, and allows texturing for unit 0 only (more units
> mean implementing the multitexturing pipeline).
> 
> + Sample
> + Update test expectations for GLES1 conformance tests
> 
> BUG=angleproject:2306
> 
> Change-Id: Id5d5603c967e577290085e5946f2cb7a03d7e017
> Reviewed-on: https://chromium-review.googlesource.com/1023988
> Commit-Queue: Lingfeng Yang <lfy@google.com>
> Reviewed-by: Geoff Lang <geofflang@chromium.org>

TBR=geofflang@chromium.org,jmadill@chromium.org,cwallez@chromium.org,lfy@google.com

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

Bug: angleproject:2306
Change-Id: Ib6fd9db433cd1a13589d5a9e82cb2c40f3cf71ff
Reviewed-on: https://chromium-review.googlesource.com/1056229Reviewed-by: Frank Henigman <fjhenigman@chromium.org>
Commit-Queue: Frank Henigman <fjhenigman@chromium.org>