app_confbridge: Eliminate a reference leak for confbridge announcer channels

git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@394583 65c4cc65-6c06-0410-ace0-fbb531ad65f3

apps/confbridge/conf_chan_announce.c

@@ -158,9 +158,6 @@ void conf_announce_channel_depart(struct ast_channel *chan)
 	}
 	ast_clear_flag(&p->base, AST_UNREAL_CARETAKER_THREAD);
 	chan = p->base.chan;
-	if (chan) {
-		ast_channel_ref(chan);
-	}
 	ao2_unlock(p);
 	ao2_ref(p, -1);
 	if (chan) {