Exclude PYPY_OPEN_BUG handling as discussed in !75.

Author: jaraco

Lib/importlib/_bootstrap_external.py

@@ -1,5 +1,4 @@
 import sys
-import os
 
 
 # Merge the body of this class into _bootstrap_external:
@@ -38,10 +37,8 @@ def _switch_path(path):
         from contextlib import suppress
         import zipfile
         from pathlib import Path
-        PYPY_OPEN_BUG = False
-        if not PYPY_OPEN_BUG or os.path.isfile(path):  # pragma: no branch
-            with suppress(Exception):
-                return zipfile.Path(path)
+        with suppress(Exception):
+            return zipfile.Path(path)
         return Path(path)
 
     @classmethod

Lib/importlib/metadata/__init__.py

@@ -1,5 +1,4 @@
 import io
-import os
 import re
 import abc
 import csv