Fix some code lints found with ruff

[Armavica]

I used the command ruff pymc --extend-ignore E501 --extend-exclude __init__.py and fixed some of the most prominent lints.

Checklist

• Explain important implementation details 👆
• Make sure that the pre-commit linting/style checks pass.
• Link relevant issues (preferably in nice commit messages)
• Are the changes covered by tests and docstrings?
• Fill out the short summary sections 👇

Major / Breaking Changes

• ...

New features

• ...

Bugfixes

• ...

Documentation

• ...

Maintenance

• Fix some code lints found with ruff

[codecov]

Codecov Report

Merging #6545 (96b7160) into main (e1d36ca) will increase coverage by 0.00%.
The diff coverage is 96.87%.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #6545   +/-   ##
=======================================
  Coverage   91.95%   91.96%           
=======================================
  Files          89       89           
  Lines       14933    14932    -1     
=======================================
  Hits        13732    13732           
+ Misses       1201     1200    -1     

Impacted Files	Coverage Δ
pymc/step_methods/hmc/integration.py	81.66% <0.00%> (ø)
pymc/step_methods/hmc/nuts.py	97.27% <ø> (-0.02%)	⬇️
pymc/distributions/dist_math.py	87.42% <100.00%> (ø)
pymc/distributions/distribution.py	96.61% <100.00%> (+0.29%)	⬆️
pymc/gp/util.py	96.55% <100.00%> (ø)
pymc/logprob/transforms.py	96.13% <100.00%> (ø)
pymc/model.py	89.90% <100.00%> (ø)
pymc/model_graph.py	80.11% <100.00%> (ø)
pymc/sampling/jax.py	98.26% <100.00%> (-0.01%)	⬇️
pymc/variational/approximations.py	90.49% <100.00%> (+0.04%)	⬆️
... and 1 more