removing https vhost for integration.mediawiki.org from gallium

since integration.mediawiki.org rewrite is handled by our primary
apaches and then pushed to misc-web-lb, the actual host doesn't need
this running anymore.  This is related to change
I8776f63119251d08ce71294a641d2fad2c388ac6.

Change-Id: Ia23362f1f0dc7d42eaf2f69abb3a93895c6c4674
RT: 6594