Remove obsolete (without effect) piece of code in bids.py for validation

[yarikoptic]

we already demand bidsschematools ~1.0 so if we are to follow the comment -- we should be fine. But also -- bids_paths seems to be not used (since 45209e2 awhile back) so it was dead code to start with.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 88.64%. Comparing base (88c3275) to head (2e6e76c).
Report is 96 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1615      +/-   ##
==========================================
+ Coverage   88.58%   88.64%   +0.06%     
==========================================
  Files          78       78              
  Lines       10937    10930       -7     
==========================================
+ Hits         9688     9689       +1     
+ Misses       1249     1241       -8     

Flag	Coverage Δ
unittests	88.64% <ø> (+0.06%)	⬆️

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[candleindark]

I don't see any affect from this piece of code either. Possibly, its use has been long removed (don't see to need to investigate more now).

[yarikoptic]

Fail is unrelated

test_parse_api_url[https://gui.dandiarchive.org/#/dandiset/000001-parsed_url0] _
/opt/hostedtoolcache/Python/3.12.10/x64/lib/python3.12/site-packages/urllib3/connectionpool.py:787: in urlopen
    response = self._make_request(
/opt/hostedtoolcache/Python/3.12.10/x64/lib/python3.12/site-packages/urllib3/connectionpool.py:488: in _make_request
    raise new_e
/opt/hostedtoolcache/Python/3.12.10/x64/lib/python3.12/site-packages/urllib3/connectionpool.py:464: in _make_request
    self._validate_conn(conn)

[github-actions]

🚀 PR was released in 0.68.0 🚀