cli: remove git_util::get_git_repo

No longer used by anything.

cli/src/git_util.rs

@@ -39,7 +39,6 @@ use jj_lib::op_store::RefTarget;
 use jj_lib::op_store::RemoteRef;
 use jj_lib::repo::ReadonlyRepo;
 use jj_lib::repo::Repo;
-use jj_lib::store::Store;
 use jj_lib::workspace::Workspace;
 use unicode_width::UnicodeWidthStr;
 
@@ -51,11 +50,6 @@ use crate::formatter::Formatter;
 use crate::ui::ProgressOutput;
 use crate::ui::Ui;
 
-// TODO: migrate to gitoxide or subprocess, and remove this function
-pub(crate) fn get_git_repo(store: &Store) -> Result<git2::Repository, CommandError> {
-    Ok(git::get_git_backend(store)?.open_git_repo()?)
-}
-
 pub fn is_colocated_git_workspace(workspace: &Workspace, repo: &ReadonlyRepo) -> bool {
     let Ok(git_backend) = git::get_git_backend(repo.store()) else {
         return false;