cosmetic: osmux: Drop extra empty line

Change-Id: I679a62c49290dfeb9e2c63890daa67002bfe3339
diff --git a/src/libosmo-mgcp/mgcp_osmux.c b/src/libosmo-mgcp/mgcp_osmux.c
index ab49cd5..706de07 100644
--- a/src/libosmo-mgcp/mgcp_osmux.c
+++ b/src/libosmo-mgcp/mgcp_osmux.c
@@ -583,7 +583,6 @@
  *  \param[in] conn connection to disable */
 void conn_osmux_disable(struct mgcp_conn_rtp *conn)
 {
-
 	OSMO_ASSERT(conn->osmux.state != OSMUX_STATE_DISABLED);
 
 	LOGPCONN(conn->conn, DOSMUX, LOGL_INFO,