refactor: change methods not using its bound instance to staticmethods

[deepsource-autofix[bot]]

The method doesn't use its bound instance. Decorate this method with @staticmethod decorator, so that Python does not have to instantiate a bound method for every instance of this class thereby saving memory and computation. Read more about staticmethods here.

[deepsource-io[bot]]

Here's the code health analysis summary for commits d51929e..74d5f06. View details on DeepSource ↗.

Analysis Summary

Analyzer	Status	Summary	Link
Shell	✅ Success		View Check ↗
Python	✅ Success	🎯 4 occurences resolved	View Check ↗

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