No longer needed after https://chromium-review.googlesource.com/513519
Loading libGLESv2 interferes with API tracing tools

BUG=angleproject:1892,angleproject:2343

Change-Id: I2ccbc99377d75d107fd644301402c52466dded21
Reviewed-on: https://chromium-review.googlesource.com/910094Reviewed-by: Jamie Madill <jmadill@chromium.org>
Commit-Queue: Yuly Novikov <ynovikov@chromium.org>