[bsc_hack] House keeping, remove dead code

This callback is not used from within the paging layer. We do
have a different set of callbacks in place. Remove it here.
diff --git a/include/openbsc/gsm_data.h b/include/openbsc/gsm_data.h
index 614c63d..6c08b03 100644
--- a/include/openbsc/gsm_data.h
+++ b/include/openbsc/gsm_data.h
@@ -252,9 +252,6 @@
  * to the gsm_bts, a timer and some more state.
  */
 struct gsm_bts_paging_state {
-	/* public callbacks */
-	void (*channel_allocated)(struct gsm_lchan *lchan);
-
 	/* pending requests */
 	struct llist_head pending_requests;
 	struct gsm_paging_request *last_request;
diff --git a/src/bsc_hack.c b/src/bsc_hack.c
index 8bc1c6b..46e9e45 100644
--- a/src/bsc_hack.c
+++ b/src/bsc_hack.c
@@ -804,12 +804,6 @@
 }
 
 /*
- * Inform anyone...
- */
-static void bsc_hack_channel_allocated(struct gsm_lchan *lchan) {
-}
-
-/*
  * Patch the various SYSTEM INFORMATION tables to update
  * the LAI
  */
@@ -914,7 +908,6 @@
 	patch_tables(bts);
 
 	paging_init(bts);
-	bts->paging.channel_allocated = bsc_hack_channel_allocated;
 
 	if (db_init(database_name, gsmnet)) {
 		printf("DB: Failed to init database. Please check the option settings.\n");