hsl: Remove the input handling for the HSL BTS
I have removed HSL support from OpenBSC, the E1/Abis code is now
unused and can be removed.
Fixes: Coverity CID 1040693
diff --git a/include/internal.h b/include/internal.h
index ddb2ae2..46b622f 100644
--- a/include/internal.h
+++ b/include/internal.h
@@ -13,9 +13,8 @@
/* use libosmo_abis_init, this is only for internal use. */
void e1inp_init(void);
-/* hsl requires these functions defined in ipaccess driver. */
+/* ipaccess.c requires these functions defined here */
struct msgb;
-void ipaccess_prepend_header(struct msgb *msg, int proto);
struct msgb *ipa_msg_alloc(int headroom);
void ipa_msg_push_header(struct msgb *msg, uint8_t proto);