Remove paho-mqtt types (not before August 10 2024)

[JonathanPlasse]

Inline types were added in https://github.com/eclipse/paho.mqtt.python/commit/70cc273f173f08e2cd8b6702e1ae6ed30cfbe075.

[AlexWaygood]

Thanks! It looks like our stubsabot bot didn't mark the package as obsolete for us because a single Python file, paho/__init__.py, is not in a directory that is covered by a py.typed file. Strictly speaking that's a bug in stubsabot, but we knew the approach introduced in https://github.com/python/typeshed/pull/11053 would have false negatives from time to time.