Remove check_git_config.py DEPS hook.
Remove check_git_config.py DEPS hook.

It is not very useful anymore.

R=kjellander@chromium.org, iannucci@chromium.org
BUG=

Review URL: https://codereview.chromium.org/1418963006

Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#357940}

axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk