Assorted code cleanups

[jwodder]

No description provided.

[codecov]

Codecov Report

Merging #859 (881e645) into master (f5d31a5) will decrease coverage by 0.05%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master     #859      +/-   ##
==========================================
- Coverage   86.33%   86.27%   -0.06%     
==========================================
  Files          58       58              
  Lines        6030     6012      -18     
==========================================
- Hits         5206     5187      -19     
- Misses        824      825       +1     

Flag	Coverage Δ
unittests	86.27% <100.00%> (-0.06%)	⬇️

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Impacted Files	Coverage Δ
dandi/utils.py	79.53% <ø> (ø)
dandi/delete.py	91.48% <100.00%> (ø)
dandi/metadata.py	81.10% <100.00%> (-0.89%)	⬇️
dandi/tests/fixtures.py	96.35% <100.00%> (-0.08%)	⬇️
dandi/tests/test_metadata.py	100.00% <100.00%> (ø)
dandi/tests/test_organize.py	93.65% <100.00%> (+0.05%)	⬆️
dandi/dandiapi.py	89.57% <0.00%> (-0.18%)	⬇️

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[yarikoptic]

Cool, thank you! Glanced through and nothing triggered an immediate concern, and tests passed, so should be all good.