Fix a big ol' memory leak. This remove() call appears to have accidentally gotten commented out in a warnings-cleanup pass because it used to assign the result of the remove to a variable only used in a commented-out Log.info(). Since the receivers stored in the hashtable can point to exciting things, like, say, puzzle panels, it was causing a pretty immense amount of stuff to get held onto.

git-svn-id: svn+ssh://src.earth.threerings.net/narya/trunk@5700 542714f4-19e9-0310-aa3c-eee0fc999fb1

src/java/com/threerings/presents/client/InvocationDirector.java

@@ -150,7 +150,7 @@ public class InvocationDirector
                 log.warning("Receiver unregistered for which we have no id to code mapping",
                             "code", receiverCode);
             } else {
-//                 Object decoder = _receivers.remove(rreg.receiverId);
+                _receivers.remove(rreg.receiverId);
 //                 Log.info("Cleared receiver " + StringUtil.shortClassName(decoder) +
 //                          " " + rreg + ".");
             }