Don't read git files when --no-gitconfig is given + unused variables (#1728)

* Fix unused variables

* Don't read git files when --no-gitconfig is given

Despite starting delta with `--no-gitconfig`, strace still shows
that `.git/config` etc. files are accessed. By no longer doing
that it is very clear that no config options are read from there.

1 files changed, 2 insertions, 0 deletions

diff --git a/src/env.rs b/src/env.rs
index 8c169bc..49c7b21 100644
--- a/src/env.rs
+++ b/src/env.rs
@@ -77,6 +77,8 @@ pub mod tests {
         env::set_var("DELTA_FEATURES", feature);
         let env = DeltaEnv::init();
         assert_eq!(env.features, Some(feature.into()));
+        // otherwise `current_dir` is not used in the test cfg:
+        assert_eq!(env.current_dir, env::current_dir().ok());
     }
 
     #[test]