Remove Python 2.7 FileNotFoundError compatibility shims #13985
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Summary
Since Python 2.7 is no longer supported, remove all instances of the FileNotFoundError compatibility shim that was used to map FileNotFoundError to IOError for Python 2.7 compatibility.
Modified files:
References
Final bit of Python 2.7 compatibility code, should close #13882
Reviewer guidance
Are there any other instances of this that have been missed? Any other Python 2.7 compatibility things still extant in the codebase?
🤖 This was created by Claude Code. @rtibbles then reviewed the generated output, and did iterative rounds of updates before making it ready for review 🤖