Removing a collaborator from a personal repository
If you're using GitHub Free, you can add unlimited collaborators on public repositories, and up to three collaborators on private repositories owned by your personal account. To add more than three other people as repository collaborators, upgrade to GitHub Pro.
When you remove a collaborator from your project, they lose read/write access to your repository. If the repository is private and the person has created a fork, then that fork is also deleted.
Deleting forks of private repositories
While forks of private repositories are deleted when a collaborator is removed, the person will still retain any local clones of your repository.
Removing collaborator permissions from a person contributing to a repository
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On GitHub Enterprise, navigate to the main page of the repository.
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Under your repository name, click Settings.
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In the left sidebar, click Collaborators & teams.
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Next to the collaborator you want to remove, click the X icon.
