Fix some CodeQL notices

[fcollonval]

No description provided.

[codecov-commenter]

Codecov Report

Base: 81.18% // Head: 80.56% // Decreases project coverage by -0.63% ⚠️

Coverage data is based on head (7909637) compared to base (bcbbc35).
Patch coverage: 100.00% of modified lines in pull request are covered.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #371      +/-   ##
==========================================
- Coverage   81.18%   80.56%   -0.63%     
==========================================
  Files          22       21       -1     
  Lines        1765     1760       -5     
  Branches      333      333              
==========================================
- Hits         1433     1418      -15     
- Misses        229      235       +6     
- Partials      103      107       +4     

Impacted Files	Coverage Δ
jupyterlab_server/config.py	73.52% <100.00%> (ø)
jupyterlab_server/handlers.py	78.23% <100.00%> (ø)
jupyterlab_server/licenses_handler.py	97.63% <100.00%> (ø)
jupyterlab_server/listings_handler.py	82.92% <100.00%> (ø)
jupyterlab_server/settings_utils.py	77.88% <100.00%> (-0.83%)	⬇️
jupyterlab_server/themes_handler.py	81.81% <100.00%> (-0.41%)	⬇️
jupyterlab_server/workspaces_handler.py	88.28% <100.00%> (+0.09%)	⬆️
jupyterlab_server/process.py	61.72% <0.00%> (-3.71%)	⬇️
jupyterlab_server/translation_utils.py	89.07% <0.00%> (-0.85%)	⬇️

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