Remove deprecated asterisk_mbox integration (#123174)

.strict-typing

homeassistant/components/asterisk_mbox/__init__.py

homeassistant/components/asterisk_mbox/mailbox.py

homeassistant/components/asterisk_mbox/manifest.json

homeassistant/components/asterisk_mbox/strings.json

homeassistant/generated/integrations.json

mypy.ini

requirements_all.txt

requirements_test_all.txt

script/licenses.py

tests/components/asterisk_mbox/__init__.py

tests/components/asterisk_mbox/const.py

tests/components/asterisk_mbox/test_init.py