remove UPR column from commit-validation status dashboard

Change-Id: Ief8c537b2cbd3fb31616ff2cac7d3da9bd6910b8
Reviewed-on: http://review.couchbase.org/38334
Reviewed-by: Philip Labee <philip@couchbase.com>
Tested-by: Philip Labee <philip@couchbase.com>