tsch: remove TSCH_LINK_NEIGHBOR_CALLBACK definition
This macro is no longer used nor referred.
#define LOG_MODULE "TSCH"
#define LOG_LEVEL LOG_LEVEL_MAC
-/* Use to collect link statistics even on Keep-Alive, even though they were
- * not sent from an upper layer and don't have a valid packet_sent callback */
-#ifndef TSCH_LINK_NEIGHBOR_CALLBACK
-#if NETSTACK_CONF_WITH_IPV6
-void uip_ds6_link_neighbor_callback(int status, int numtx);
-#define TSCH_LINK_NEIGHBOR_CALLBACK(dest, status, num) uip_ds6_link_neighbor_callback(status, num)
-#endif /* NETSTACK_CONF_WITH_IPV6 */
-#endif /* TSCH_LINK_NEIGHBOR_CALLBACK */
-
/* The address of the last node we received an EB from (other than our time source).
* Used for recovery */
static linkaddr_t last_eb_nbr_addr;
