More cleanup

However!  pip 22.2.2 still relies on pkgutil.ImpImporter so these things
cannot be removed until this issue is resolved:

pypa/pip#11501

Doc/library/pkgutil.rst

@@ -48,33 +48,6 @@ support.
    this function to raise an exception (in line with :func:`os.path.isdir`
    behavior).
 
-
-.. class:: ImpImporter(dirname=None)
-
-   :pep:`302` Finder that wraps Python's "classic" import algorithm.
-
-   If *dirname* is a string, a :pep:`302` finder is created that searches that
-   directory.  If *dirname* is ``None``, a :pep:`302` finder is created that
-   searches the current :data:`sys.path`, plus any modules that are frozen or
-   built-in.
-
-   Note that :class:`ImpImporter` does not currently support being used by
-   placement on :data:`sys.meta_path`.
-
-   .. deprecated:: 3.3
-      This emulation is no longer needed, as the standard import mechanism
-      is now fully :pep:`302` compliant and available in :mod:`importlib`.
-
-
-.. class:: ImpLoader(fullname, file, filename, etc)
-
-   :term:`Loader <loader>` that wraps Python's "classic" import algorithm.
-
-   .. deprecated:: 3.3
-      This emulation is no longer needed, as the standard import mechanism
-      is now fully :pep:`302` compliant and available in :mod:`importlib`.
-
-
 .. function:: find_loader(fullname)
 
    Retrieve a module :term:`loader` for the given *fullname*.

Lib/pydoc.py

@@ -2233,7 +2233,7 @@ def run(self, callback, key=None, completer=None, onerror=None):
                 callback(None, modname, '')
             else:
                 try:
-                    spec = pkgutil._get_spec(importer, modname)
+                    spec = importer.find_spec(importer, modname)
                 except SyntaxError:
                     # raised by tests for bad coding cookies or BOM
                     continue

Lib/test/test_importlib/test_abc.py

@@ -166,8 +166,7 @@ def test_invalidate_caches(self):
 
 class PathEntryFinder:
 
-    def find_loader(self, fullname):
-        return super().find_loader(fullname)
+    pass
 
 
 class PathEntryFinderDefaultsTests(ABCTestHarness):
@@ -186,8 +185,7 @@ def test_invalidate_caches(self):
 
 class Loader:
 
-    def load_module(self, fullname):
-        return super().load_module(fullname)
+    pass
 
 
 class LoaderDefaultsTests(ABCTestHarness):

Lib/test/test_venv.py

@@ -659,8 +659,8 @@ def nicer_error(self):
         try:
             yield
         except subprocess.CalledProcessError as exc:
-            out = exc.output.decode(errors="replace")
-            err = exc.stderr.decode(errors="replace")
+            out = 'No output' if exc.output is None else exc.output.decode(errors="replace")
+            err = 'No stderr' if exc.stderr is None else exc.stderr.decode(errors="replace")
             self.fail(
                 f"{exc}\n\n"
                 f"**Subprocess Output**\n{out}\n\n"