Revert "Fix spurious errors on builtins.open (#15161)" (#15508)

hauntsaninja · web-flow · commit ef87305e2aef · 2023-06-23T18:11:11.000-07:00
diff --git a/mypy/semanal_main.py b/mypy/semanal_main.py
@@ -75,7 +75,6 @@
     "abc",
     "collections",
     "collections.abc",
-    "typing_extensions",
 ]
 
 
