Remove import-time logging setup

[nsheff]

pepdbagent used to configure logging as a side effect of being imported. __init__.py called logmuse.init_logger("pepdbagent") and then coloredlogs.install(), so simply running import pepdbagent would attach a handler and start coloring output.

That is the wrong place for that decision. pepdbagent is a library with no command line of its own, so the application using it should decide how its logs look.

Worse, init_logger sets propagate = False on the logger. That disconnects pepdbagent from the normal logging chain, so an application that configures logging the usual way gets nothing from pepdbagent at all. The only way around it is to reach in and configure the pepdbagent logger by name.

That is exactly what pephub does today, in pephub/main.py, where it sets its own level and [PEPDBAGENT] prefix. That still works after this change, so nothing needs to be updated in pephub. It just no longer has to fight the defaults.

This PR deletes the setup block from __init__.py and drops logmuse and coloredlogs from the dependencies, since nothing else in the package used either one. Every module already gets its logger with logging.getLogger(PKG_NAME), and nothing imported _LOGGER from the package root, so there is nothing else to change.

This follows the guidance added in logmuse 0.3.0, which now also applies colors on its own when coloredlogs is installed. Similar cleanups are needed in geopephub, bedboss, bedhost, and pephubclient.

[khoroshevskyi]

LGTM