Make them static (fixing build break?) as they aren't needed by Display

py/objarray.c

@@ -92,7 +92,7 @@ STATIC void array_print(const mp_print_t *print, mp_obj_t o_in, mp_print_kind_t
 #endif
 
 #if MICROPY_PY_BUILTINS_BYTEARRAY || MICROPY_PY_ARRAY
-mp_obj_array_t *array_new(char typecode, size_t n) {
+STATIC mp_obj_array_t *array_new(char typecode, size_t n) {
     int typecode_size = mp_binary_get_size('@', typecode, NULL);
     mp_obj_array_t *o = m_new_obj(mp_obj_array_t);
     #if MICROPY_PY_BUILTINS_BYTEARRAY && MICROPY_PY_ARRAY
@@ -396,7 +396,7 @@ STATIC mp_obj_t array_extend(mp_obj_t self_in, mp_obj_t arg_in) {
 STATIC MP_DEFINE_CONST_FUN_OBJ_2(array_extend_obj, array_extend);
 #endif
 
-mp_obj_t array_subscr(mp_obj_t self_in, mp_obj_t index_in, mp_obj_t value) {
+STATIC mp_obj_t array_subscr(mp_obj_t self_in, mp_obj_t index_in, mp_obj_t value) {
     if (value == MP_OBJ_NULL) {
         // delete item
         // TODO implement