Revert "gsm_04_11: Speculative fix for MT SMS and SAPI 'n Reject"

Let's revert it and see if we can find the real issue about the
sms being invalid. Sylvain has pointed out that we get invoked
from a timer and might not have stopped it properly.

This reverts commit 80ba9b5dd62cc8bfd10dae2f3b63420ef1e8452d.
diff --git a/openbsc/src/libmsc/gsm_04_11.c b/openbsc/src/libmsc/gsm_04_11.c
index cc93ae6..19b6030 100644
--- a/openbsc/src/libmsc/gsm_04_11.c
+++ b/openbsc/src/libmsc/gsm_04_11.c
@@ -988,7 +988,6 @@
 
 	net = conn->bts->network;
 
-restart:
 	llist_for_each_entry_safe(trans, tmp, &net->trans_list, entry)
 		if (trans->conn == conn) {
 			struct gsm_sms *sms = trans->sms.sms;
@@ -1002,7 +1001,6 @@
 			sms_free(sms);
 			trans->sms.sms = NULL;
 			trans_free(trans);
-			goto restart;
 		}
 }