A house-keeping improvement.
Check why the warning is raised here : https://github.com/pytorch/ignite/actions/runs/214923621
and fix if necessary.

For Hacktoberfest contributors, feel free to ask questions for details if any and say that you would like to tackle the issue.
Please, take a look at CONTRIBUTING guide.