update Archipelago

Utils.py

@@ -19,10 +19,8 @@ import os
 import subprocess
 import sys
 import pickle
-import io
-import builtins
-
 import functools
+import io
 
 from yaml import load, dump, safe_load
 
@@ -380,6 +378,11 @@ safe_builtins = {
     'frozenset',
 }
 
+safe_builtins = {
+    'set',
+    'frozenset',
+}
+
 
 class RestrictedUnpickler(pickle.Unpickler):
     def find_class(self, module, name):
@@ -392,4 +395,4 @@ class RestrictedUnpickler(pickle.Unpickler):
 
 def restricted_loads(s):
     """Helper function analogous to pickle.loads()."""
-    return RestrictedUnpickler(io.BytesIO(s)).load()
+    return RestrictedUnpickler(io.BytesIO(s)).load()