delete search.wikimedia.org Apache config file

this file in puppet/files/apache/sites isn't used
by puppet classes anymore.

instead meanwhile this is on the cluster, so:

search.wikimedia.org is an alias for wikimedia-lb.wikimedia.org.

and it's handled in operations/apache-config in
search.wikimedia.conf

Change-Id: I3ae5fd3ba2a3ee2e90346b75ef4fed093751657c