revert the dynamic_list insertion change... that was not the right thing to do

git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/1.4@49600 65c4cc65-6c06-0410-ace0-fbb531ad65f3

channels/chan_iax2.c

@@ -869,7 +869,6 @@ static struct iax2_thread *find_idle_thread(void)
 					thread = NULL;
 				} else {
 					/* All went well and the thread is up, so increment our count */
-					AST_LIST_INSERT_TAIL(&dynamic_list, thread, list);
 					iaxdynamicthreadcount++;
 				}
 			}