Deprecated `logging.config.modules`

[Alastor Wu]

Hello,

In bug 1914388, I plan to remove the usage of logging.config.modules, which was originally introduced as a workaround for about:logging not working on Android.

Since about:logging is now supported on Android, this workaround is no longer necessary.

Note that you can still add logging prefs by using logging.XXX — this behavior remains unchanged.

Thanks!

Best,
Alastor