remove unnecessary imports and dead code from Torflow's BwAuthority

Currently, BwAuthority code imports stuff which are never used as well has having code which isn't used.

Trac:
Username: ewong

added component::core tor/torflow owner::tom priority::low reporter::ewong resolution::fixed severity::normal status::closed type::defect labels

Tag! I just made tjr the component owner for torflow. Hopefully he will at least help to triage. :)

Trac:
Status: new to assigned
Owner: aagbsn to tjr

Proposed patch: https://github.com/ewongbb/torflow/tree/remove_dead_code

Trac:
Username: ewong

Trac:
Username: ewong
Status: assigned to needs_review

tom is the new tjr, I hear

Trac:
Owner: tjr to tom
Status: needs_review to assigned

Trac:
Status: assigned to needs_review

This looks good to me I will try to merge it in the next day or two if teor doesn't get it first

https://gitweb.torproject.org/torflow.git/commit/?id=8336de82bc451dcbb169c06e95dfa3795f81e744

Trac:
Status: needs_review to closed
Resolution: N/A to fixed

closed

moved to tpo/network-health/torflow#24049 (closed)