ns2: ns2_recv_vc: remove unused parameter nsi

Change-Id: I0dbc079e83d37de01a4260442363ed5fdcd51d28
diff --git a/src/gb/gprs_ns2.c b/src/gb/gprs_ns2.c
index 835c22a..05d4972 100644
--- a/src/gb/gprs_ns2.c
+++ b/src/gb/gprs_ns2.c
@@ -844,12 +844,10 @@
 
 
 /*! Bottom-side entry-point for received NS PDU from the driver/bind
- * \param[in] nsi NS instance
  * \param[in] nsvc NS-VC for which the message was received
  * \param msg the received message. Ownership is trasnferred, caller must not free it!
  * \return 0 on success; negative on error */
-int ns2_recv_vc(struct gprs_ns2_inst *nsi,
-		struct gprs_ns2_vc *nsvc,
+int ns2_recv_vc(struct gprs_ns2_vc *nsvc,
 		struct msgb *msg)
 {
 	struct gprs_ns_hdr *nsh = (struct gprs_ns_hdr *) msg->l2h;