Revert "bpo-38659: [Enum] add _simple_enum decorator (GH-25285)" (GH-25476)

This reverts commit dbac8f40e81eb0a29dc833e6409a1abf47467da6.
diff --git a/Lib/uuid.py b/Lib/uuid.py
index 67da885..5ae0a3e 100644
--- a/Lib/uuid.py
+++ b/Lib/uuid.py
@@ -47,7 +47,7 @@
 import os
 import sys
 
-from enum import Enum, _simple_enum
+from enum import Enum
 
 
 __author__ = 'Ka-Ping Yee <ping@zesty.ca>'
@@ -75,8 +75,7 @@
 bytes_ = bytes  # The built-in bytes type
 
 
-@_simple_enum(Enum)
-class SafeUUID:
+class SafeUUID(Enum):
     safe = 0
     unsafe = -1
     unknown = None