Eventing: remove vb_distribution_stats as it is removed from eventing
Eventing: remove vb_distribution_stats as it is removed from eventing

Change-Id: I85b77f2890b5766757b50234b5c240b48f229e43
Reviewed-on: http://review.couchbase.org/91883
Tested-by: Build Bot <80754af91bfb6d1073585b046fe0a474ce868509@couchbase.com>
Reviewed-by: Mahesh Mandhare <f05f25073b6d9a2858c6a374b80c02d5a2bccf33@couchbase.com>

couchbase/perfrunner,couchbase/perfrunner,couchbase/perfrunner,couchbase/perfrunner,pavel-paulau/perfrunner,couchbase/perfrunner,pavel-paulau/perfrunner,pavel-paulau/perfrunner,pavel-paulau/perfrunner,pavel-paulau/perfrunner,couchbase/perfrunner