cob: Remove redundant indentation

Signed-off-by: Alexis Sellier <alexis@radicle.xyz>

radicle-cob/src/backend/git/change.rs

@@ -234,8 +234,6 @@ where
         .collect::<Vec<_>>();
 
     let trailers: Vec<OwnedTrailer> = vec![trailers::ResourceCommitTrailer::from(resource).into()];
-
-    {
     let author = repo.signature()?;
     let timestamp = author.when().seconds();
 
@@ -270,7 +268,6 @@ where
     .write(repo)?;
 
     Ok((Oid::from(oid), timestamp as u64))
-    }
 }
 
 fn write_manifest(