Remove no longer needed _mount module util (#11232)

Remove no longer needed _mount module util.

plugins/module_utils/_mount.py

@@ -1,50 +0,0 @@
-# This code is part of Ansible, but is an independent component.
-# This particular file snippet, and this file snippet only, is based on
-# Lib/posixpath.py of cpython
-#
-# Copyright (c) 2001-2022 Python Software Foundation.  All rights reserved.
-# It is licensed under the PYTHON SOFTWARE FOUNDATION LICENSE VERSION 2
-# (See LICENSES/PSF-2.0.txt in this collection)
-# SPDX-License-Identifier: PSF-2.0
-
-from __future__ import annotations
-
-
-import os
-
-
-def ismount(path):
-    """Test whether a path is a mount point
-    This is a copy of the upstream version of ismount(). Originally this was copied here as a workaround
-    until Python issue 2466 was fixed. Now it is here so this will work on older versions of Python
-    that may not have the upstream fix.
-    https://github.com/ansible/ansible-modules-core/issues/2186
-    http://bugs.python.org/issue2466
-    """
-    try:
-        s1 = os.lstat(path)
-    except (OSError, ValueError):
-        # It doesn't exist -- so not a mount point. :-)
-        return False
-    else:
-        # A symlink can never be a mount point
-        if os.path.stat.S_ISLNK(s1.st_mode):
-            return False
-
-    if isinstance(path, bytes):
-        parent = os.path.join(path, b"..")
-    else:
-        parent = os.path.join(path, "..")
-    parent = os.path.realpath(parent)
-    try:
-        s2 = os.lstat(parent)
-    except (OSError, ValueError):
-        return False
-
-    dev1 = s1.st_dev
-    dev2 = s2.st_dev
-    if dev1 != dev2:
-        return True  # path/.. on a different device as path
-    ino1 = s1.st_ino
-    ino2 = s2.st_ino
-    return ino1 == ino2  # path/.. is the same i-node as path

plugins/modules/aix_filesystem.py

@@ -165,7 +165,7 @@ EXAMPLES = r"""
 
 
 from ansible.module_utils.basic import AnsibleModule
-from ansible_collections.community.general.plugins.module_utils._mount import ismount
+from os.path import ismount
 import re