Summary:
We no longer use repository configs, so remove the `repository` subcommand
that supported adding and listing these configurations.
The main information that used to be included in the repository configuration
was the bind mount settings. This has since been replaced with the
`.eden-redirections` file that is placed directly in each repository.
Reviewed By: wez
Differential Revision: D20876462
fbshipit-source-id: cc7d8e6f0a6a2e04fbf3159417af41a44908b3a8
ef8c3435c4