PVAServer: Skip redundant unregisterSubscription

removeClient already includes unregisterSubscription

Author: kasemir

core/pva/src/main/java/org/epics/pva/server/PVAServer.java

@@ -261,10 +261,7 @@ void register(final ServerTCPHandler tcp_connection)
     void shutdownConnection(final ServerTCPHandler tcp_connection)
     {
         for (ServerPV pv : pv_by_name.values())
-        {
             pv.removeClient(tcp_connection, -1);
-            pv.unregisterSubscription(tcp_connection, -1);
-        }
 
         // If this is still a known handler, close it, but don't wait
         if (tcp_handlers.remove(tcp_connection))