mgcp_osmux: Drop duplicated conn_osmux_release_cid() in code path

Change-Id: I65d9978ee93ef9b1a2e48a92617ae8de3e131a93
diff --git a/src/libosmo-mgcp/mgcp_osmux.c b/src/libosmo-mgcp/mgcp_osmux.c
index de19042..abc3f0e 100644
--- a/src/libosmo-mgcp/mgcp_osmux.c
+++ b/src/libosmo-mgcp/mgcp_osmux.c
@@ -524,7 +524,6 @@
 
 		osmux_xfrm_input_close_circuit(conn->osmux.in, conn->osmux.cid);
 		conn->osmux.state = OSMUX_STATE_DISABLED;
-		conn_osmux_release_cid(conn);
 		osmux_handle_put(conn->osmux.in);
 	}
 	conn_osmux_release_cid(conn);