I noticed this file showed up when revendoring dependencies
with vndr.
Also removed `github.com/Microsoft/opengcs` from vendor.conf
as it was not used;
2017/12/05 22:41:58 WARNING: package github.com/Microsoft/opengcs is unused, consider removing it from vendor.conf
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>