Remove unviolated linting rules

[matsumotosan]

What does this PR do?

Fix ignored linting rules. All rules were not violated except for RET504 (violations autofixed).

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📚 Documentation preview 📚: https://pytorch-lightning--21229.org.readthedocs.build/en/21229/

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 87%. Comparing base (e088694) to head (b4b8a3f).

Additional details and impacted files

@@           Coverage Diff            @@
##           master   #21229    +/-   ##
========================================
- Coverage      87%      87%    -1%     
========================================
  Files         269      269            
  Lines       23688    23688            
========================================
- Hits        20669    20533   -136     
- Misses       3019     3155   +136     

[deependujha]

I personally prefer keeping explicit assignments for readability/debugging, but I’m fine with enabling RET504 if consistency is the goal.

[Borda]

I personally prefer keeping explicit assignments for readability/debugging, but I’m fine with enabling RET504 if consistency is the goal.

You can simply add a comment which would be even better