🧹 [Code Health] Remove unused os import from fetcher.py

[frostmute]

🎯 What: The unused import os statement has been removed from claw2manus/fetcher.py.
💡 Why: Removing unused imports reduces clutter, prevents potential confusion for future developers, and maintains overall code hygiene.
✅ Verification: I successfully removed the import os line and verified the change by running the test suite (python3 -m pytest), which passed all its cases without issues.
✨ Result: A cleaner fetcher.py file with no unused imports.

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PR created automatically by Jules for task 9238439302650592365 started by @frostmute

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[gemini-code-assist]

Code Review

This pull request removes an unused import of the os module from claw2manus/fetcher.py. I have no feedback to provide as there are no review comments.