Remove print STDERR of cutoff years in bib_rights.pm initializer

[moseshll]

Currently lines 68-69.

Consider exposing a method cutoff_years if we want to get these in a data structure for inspection.

This will remove the need for Capture::Tiny in this repo's tests, and in CRMS.

Comments from now-defunct DEV-458:

• BIB_RIGHTS_DATE override
• us_pd_cutoff_year, non_us_pd_cutoff_year, can_aus_pd_cutoff_year, ntis_cutoff_year whether overridden or not (this is the most annoying)
• us_fed_pub_exception_file passed in ENV
  • number of OCLC numbers in file
  • error if file is unreadable (probably should be left in as legitimate diagnostic)
• Missing 008/FMT (probably legit)
• "$bib_key: $oclc on us fed pub exception list"
• Default SE and XX fallthroughs in getBibFmt()