radicle/git/raw: `Config` not used on Windows

Fix a clippy lint that sneaked in…

crates/radicle/src/git/raw.rs

@@ -6,10 +6,12 @@
 
 // Re-exports that are only used within this crate.
 pub(crate) use git2::{
-    message_trailers_strs, AutotagOption, Blob, Config, FetchOptions, FetchPrune, Object, Revwalk,
-    Sort,
+    message_trailers_strs, AutotagOption, Blob, FetchOptions, FetchPrune, Object, Revwalk, Sort,
 };
 
+#[cfg(unix)]
+pub(crate) use git2::Config;
+
 // Re-exports that are only used within this crate for testing.
 #[cfg(any(test, feature = "test"))]
 pub(crate) use git2::RemoteCallbacks;