Rotate and remove Github API Token

[David Wittman]

Hey @JamesMcGuigan, you've committed your Github API Tokens in your .bash_vars file. This could lead to an account compromise so you should rotate these and remove them from source control.

[James McGuigan]

Thanks for looking out for me.

The token is question is my HOMEBREW_GITHUB_API_TOKEN. This is needed by homebrew to public github repos, but is otherwise configured to have no actual permissions to access my account.