Removing yourself from a collaborator's repository

If you no longer want to be a collaborator on someone else's repository, you can remove yourself.

If you're using GitHub Free, you can add unlimited collaborators on public and private repositories.

In the upper-right corner of any page, click your profile photo, then click Settings.
In the left sidebar, click Repositories.
Next to the repository you want to leave, click Leave.
Read the warning carefully, then click "I understand, leave this repository."