seq: removed an out-dated comment

The first removed paragraph was just wrong. The second one proposed
alternatives which I no longer regard as being superior. Connection loss
is not supposed to happen regularly during normal operation, so the
small overhead of waking all state sets is negligable in practice.

src/seq/seq_ca.c

@@ -494,16 +494,6 @@ void seq_conn_handler(int connected, void *arg)
 	   Why each one? Because pvConnectCount and pvMonitorCount should
 	   act like monitored anonymous channels. Any state set might be
 	   using these functions inside a when-condition and it is expected
-	   that such conditions get checked whenever these counts change.
-
-	   Another reason is the pvConnected built-in: a state set with a
-	   when(pvConnected(var)) should be able to make progress
-	   if the channel is now connected.
-
-	   TODO: This is really a crude solution. It would be better to post
-	   special events reserved for pvConnectCount and pvMonitorCount
-	   (if we could assume safe mode is always on we'd just turn them
-	   into anonymous PVs), and to post the regular PV event for the
-	   variable that has connected (or disconnected). */
+	   that such conditions get checked whenever these counts change. */
 	ss_wakeup(sp, 0);
 }