message: Drop PathSource TODO in GitSource
  This effort was started in
  and looks (to me) to be resolved at this point.
diff: @@ -11,8 +11,6 @@ use util::hex::short_hash;
  use sources::PathSource;
  use sources::git::utils::{GitRemote, GitRevision};
  -/* TODO: Refactor GitSource to delegate to a PathSource
  - */
  pub struct GitSource<'cfg> {
  remote: GitRemote,
  reference: GitReference,
  