Cleanup warnings on eslint. Formatted all and modified a typo for cre…

[Angra974]

Description

When starting the application, some warnings come to us.
With new update of Eslint, these warnings come into errors and you can't continue to use the application.

So, this PR is intended to resolve these issues

Fixes #1239

Type of change

Delete unused variables.
As i've reverted back to the main branch, eslint configuration and an updated package.json files with eslint update inside was use.
In this case, some formatting was done in the same time than the correction for the unused variables.

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• [] Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

How Has This Been Tested?

Run :
yarnlint
check for errors/warnings
Clean up errors/warnings
yarn format
yarn lint
check for error/warnings
yarn format
yarn lint

Please describe the tests that you ran to verify your changes. Provide instructions so we can reproduce.

Checklist:

• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• Any dependent changes have been merged and published in downstream modules

Screenshots or example output

![Capture d’écran du 2023-10-14 03-01-30](https://github.com/reactplay/react-play/assets/48807534/92fc870f-a291-4586-a12c-d66fbf3ef2

be)

As i've refactored a little bit more the Multiplayer Tic-tac-toe, i've played with the play after run to check if no problem occurs.

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[Angra974]

Seems like I didn't sent the file with the modification for the typo in the form with this PR. So i've deleted the related image.
Will do it in another PR later.

[priyankarpal]

Seems like I didn't sent the file with the modification for the typo in the form with this PR. So i've deleted the related image. Will do it in another PR later.

ok