Remove geofence_countries, not used

firmware/inc/geofence_countries.h

@@ -1,29 +0,0 @@
-/**
- * Autogenerated country structures. See sim/geofence
- */
-
-#ifndef GEOFENCE_COUNTRIES_H
-#define GEOFENCE_COUNTRIES_H
-
-
-#include <stdbool.h>
-
-#include "samd20.h"
-
-
-/**
- * struct representing all we need to know about a country
- */
-struct country_t {
-  const int32_t** outlines;
-  const int32_t outline_count;
-  const uint32_t* outline_lengths;
-  char* name;
-  char* isocode;
-  bool data_tx, aprs_tx;
-};
-
-
-const struct country_t countries[233];
-
-#endif /* GEOFENCE_COUNTRIES_H */