jquery.client.test: Remove reference to decommissioned TestSwarm server

The builds were periodically purged anyway, and this install in general was
already decommissioned in 2012. And whatever ghost was left is now gone
for good as Toolserver accounts are disabled.

Change-Id: Iec7d9cbfe92981cddc56f296a265287a168cc5d9
Merge "jquery.client.test: Remove reference to decommissioned TestSwarm server"