Fix clippy complaints

[jacinta-stacks]

Blocking CI for a bunch of PRs.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 65.28%. Comparing base (77a5072) to head (92cfde8).
⚠️ Report is 2 commits behind head on develop.

❌ Your project status has failed because the head coverage (65.28%) is below the target coverage (80.00%). You can increase the head coverage or adjust the target coverage.

Additional details and impacted files

@@             Coverage Diff              @@
##           develop    #6823       +/-   ##
============================================
- Coverage    76.87%   65.28%   -11.60%     
============================================
  Files          586      586               
  Lines       362684   357076     -5608     
============================================
- Hits        278817   233100    -45717     
- Misses       83867   123976    +40109     

Files with missing lines	Coverage Δ
stacks-common/src/util/hash.rs	80.00% <100.00%> (-3.76%)	⬇️

... and 474 files with indirect coverage changes

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