Remove no longer needed _mount module util (ansible-collections#11232)

Remove no longer needed _mount module util.

(cherry picked from commit d30428a)

Author: felixfontein

LICENSES/PSF-2.0.txt

@@ -139,6 +139,6 @@ This collection is primarily licensed and distributed as a whole under the GNU G
 
 See [LICENSES/GPL-3.0-or-later.txt](https://github.com/ansible-collections/community.general/blob/stable-12/COPYING) for the full text.
 
-Parts of the collection are licensed under the [BSD 2-Clause license](https://github.com/ansible-collections/community.general/blob/stable-12/LICENSES/BSD-2-Clause.txt), the [MIT license](https://github.com/ansible-collections/community.general/blob/stable-12/LICENSES/MIT.txt), and the [PSF 2.0 license](https://github.com/ansible-collections/community.general/blob/stable-12/LICENSES/PSF-2.0.txt).
+Parts of the collection are licensed under the [BSD 2-Clause license](https://github.com/ansible-collections/community.general/blob/stable-12/LICENSES/BSD-2-Clause.txt) and the [MIT license](https://github.com/ansible-collections/community.general/blob/stable-12/LICENSES/MIT.txt).
 
 All files have a machine readable `SDPX-License-Identifier:` comment denoting its respective license(s) or an equivalent entry in an accompanying `.license` file. Only changelog fragments (which will not be part of a release) are covered by a blanket statement in `REUSE.toml`. This conforms to the [REUSE specification](https://reuse.software/spec/).

README.md

@@ -0,0 +1,6 @@
+bugfixes:
+  - "aix_filesystem - remove compatibility code for ancient Python versions (https://github.com/ansible-collections/community.general/pull/11232)."
+minor_changes:
+  - "The last code included in the collection that was licensed under the PSF 2.0 license was removed form the collection.
+     This means that now all code is either GPLv3+ licensed, MIT licensed, or BSD-2-clause licensed
+     (https://github.com/ansible-collections/community.general/pull/11232)."

changelogs/fragments/11232-mount.yml

@@ -165,7 +165,7 @@
 
 
 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