This reverts commit 048547e7.

Reason for revert: crashes on Debug bots (at least Mac)

Original change's description:
> Enable EVENT trace to print GLenum as string
> 
> Bug: angleproject:3778
> Change-Id: Ib3a4bd6ba631e0165d571789bbfab9b4b1905d8d
> Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/1737141
> Commit-Queue: Jamie Madill <jmadill@chromium.org>
> Reviewed-by: Jamie Madill <jmadill@chromium.org>
> Reviewed-by: Tobin Ehlis <tobine@google.com>

TBR=tobine@google.com,jmadill@chromium.org,lujc@google.com

Change-Id: Ib72f932f9b99bf981399759b17cec456b3ffafc1
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: angleproject:3778
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/1745835Reviewed-by: Yuly Novikov <ynovikov@chromium.org>
Commit-Queue: Yuly Novikov <ynovikov@chromium.org>