glbench/images: remove all files under glbench/images

This repository is defunct. The actual images in use are under
autotest/files/client/deps/glbench-images/

BUG=none
TEST=none
CQ-DEPEND=CL:390324

Change-Id: If9b51c59a7edbcb892ec86a687a41d63db8e4f1a
Reviewed-on: https://chromium-review.googlesource.com/390360
Tested-by: Haixia Shi <hshi@chromium.org>
Reviewed-by: Ilja H. Friedel <ihf@chromium.org>
314 files changed
tree: 4b825dc642cb6eb9a060e54bf8d69288fbee4904

This tree is empty.