git: remove stale comment about first export being a no-op
This should have been part of commit
@@ -257,8 +257,8 @@ fn export_changes(
}
/// Reflect changes made in the Jujutsu repo since last export in the underlying
-/// Git repo. If this is the first export, nothing will be exported. The
-/// exported view is recorded in the repo (`.jj/repo/git_export_view`).
+/// Git repo. The exported view is recorded in the repo
+/// (`.jj/repo/git_export_view`).
pub fn export_refs(
mut_repo: &mut MutableRepo,
git_repo: &git2::Repository,
