chore: remove unused sys import

[operagxoksana]

Removes an unused sys import from scripts/update-python-versions.py, reducing minor dead code without affecting functionality.

Greptile Summary

This PR removes an unused import sys statement from scripts/update-python-versions.py. The sys module is confirmed to be entirely unreferenced throughout the file — the script relies exclusively on argparse, re, and pathlib.Path for its functionality.

• Removes dead code (import sys) with no functional change
• The script's version normalization, pyproject.toml updates, dependency constraint rewrites, and __init__.py version bumps remain completely unaffected
• Trivial and safe cleanup

Confidence Score: 5/5

• This PR is entirely safe to merge; it removes a single unused import with no side effects or functional impact.
• This is a minimal, trivially correct dead-code cleanup. The sys module is definitively unreferenced in the file and removing it cannot affect behavior. No dependencies, logic, or functionality are altered.
• No files require special attention

Flowchart

%%{init: {'theme': 'neutral'}}%%
flowchart TD
    A([Start]) --> B[Parse CLI args\nversion, --dry-run, --verbose]
    B --> C[normalize_version\nConvert to PEP 440 format]
    C --> D[discover_package_dirs\nFind pyproject.toml files]
    D --> E[get_elizaos_package_names\nCollect known elizaos packages]
    E --> F{For each\npackage dir}
    F --> G[update_pyproject_version\nSet version = x.y.z]
    F --> H[update_pyproject_dependencies\nUpdate elizaos dep constraints]
    F --> I[update_init_version\nSet __version__ in __init__.py]
    G --> J{dry_run?}
    H --> J
    I --> J
    J -- Yes --> K[Print changes only]
    J -- No --> L[Write files to disk]
    K --> M([Done — print summary])
    L --> M

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