cosmetic: gsm_04_08.c: drop unused struct gsm_lai

Change-Id: I3236841b1701dc902754d4a388c7806b0685a91e
diff --git a/src/libmsc/gsm_04_08.c b/src/libmsc/gsm_04_08.c
index 437cb59..563b835 100644
--- a/src/libmsc/gsm_04_08.c
+++ b/src/libmsc/gsm_04_08.c
@@ -82,12 +82,6 @@
 static int gsm48_tx_simple(struct gsm_subscriber_connection *conn,
 			   uint8_t pdisc, uint8_t msg_type);
 
-struct gsm_lai {
-	uint16_t mcc;
-	uint16_t mnc;
-	uint16_t lac;
-};
-
 static uint32_t new_callref = 0x80000001;
 
 /* Determine if the given CLASSMARK (1/2/3) value permits a given A5/n cipher */