Don't pre-import array module.

py/runtime.c

@@ -130,7 +130,6 @@ void rt_init(void) {
 
     mp_obj_t m_array = mp_obj_new_module(MP_QSTR_array);
     rt_store_attr(m_array, MP_QSTR_array, (mp_obj_t)&array_type);
-    rt_store_name(MP_QSTR_array, m_array);
 
     // built-in user functions
     mp_map_add_qstr(&map_builtins, MP_QSTR_abs, (mp_obj_t)&mp_builtin_abs_obj);