Revert "Fix a typo in parallel_context.py"

[kurisusnowdeng]

Reverts #2408

[github-actions]

Your pre-commit check failed, follow the steps to run pre-commit on your file for code style consistency.

1. install pre-commit via "pip install pre-commit"
2. install pre-commit hooks via "pre-commit install"
3. run pre-commit on file with format error via "pre-commit run --files path" by replacing "path" with the actual file path
4. commit and push to your branch

View your job at https://github.com/hpcaitech/ColossalAI/actions/runs/3955327260.
Read our "CONTRIBUTING.md" for more reference to the code style.