tests/msc_vlr: fix: do not pass RAT type to expect_bssap_clear()

The function name implies OSMO_RAT_GERAN_A, and it has nothing
to do with other OSMO_RAT_* types. Found using clang:

  warning: too many arguments in call to 'expect_bssap_clear'
           expect_bssap_clear(OSMO_RAT_GERAN_A);
	                      ^^^^^^^^^^^^^^^^

Change-Id: Id3a3af33fcc5da4ca4c48a2f589a69f3568d2586
diff --git a/tests/msc_vlr/msc_vlr_test_reject_concurrency.c b/tests/msc_vlr/msc_vlr_test_reject_concurrency.c
index fe53469..648313f 100644
--- a/tests/msc_vlr/msc_vlr_test_reject_concurrency.c
+++ b/tests/msc_vlr/msc_vlr_test_reject_concurrency.c
@@ -308,7 +308,7 @@
 	BTW("The original CM Service Request can conclude");
 
 	/* Release connection */
-	expect_bssap_clear(OSMO_RAT_GERAN_A);
+	expect_bssap_clear();
 	conn_conclude_cm_service_req(g_msub, MSC_A_USE_CM_SERVICE_SMS);
 
 	btw("all requests serviced, conn has been released");