Loader: Remove default family states for hosts from code

[BigRoy]

Description

This removes the Avalon data being set for familiesStateToggled and familiesStateDefault from the install() logic for hosts.

Specifically:

• avalon.api.data["familiesStateToggled"]
• avalon.api.data["familiesStateDefault"]

This can be removed since the code does nothing within OpenPype due to overriding this behavior with the admin settings with project_settings/global/tools/loader/family_filter_profiles

Question

Even though it currently did nothing within OpenPype - would we like to save default settings with OpenPype that match what this code did originally. The current OpenPype default settings define no filtering whatsoever.

Testing notes:

1. Run OpenPype without! this PR and confirm the original code indeed does nothing in OpenPype.
2. Run a host with this PR and make sure the tools, specifically loader and library loader still work.

I tested both in Maya + Houdini. Also tested with custom settings set in Admin Settings for a host and with settings removed in OpenPype for a host. Behavior was the same before and after - nothing being filtered when not set in settings.