submodule--helper: remove unused "list" helper

Remove the "submodule--helper list" sub-command, which hasn't been
used by git-submodule.sh since 2964d6e5e1e (submodule: port subcommand
'set-branch' from shell to C, 2020-06-02).

There was a test added in 2b56bb7a87a (submodule helper list: respect
correct path prefix, 2016-02-24) which relied on it, but the right
thing to do here is to delete that test as well.

That test was regression testing the "list" subcommand itself. We're
not getting anything useful from the "list | cut -f2" invocation that
we couldn't get from "foreach 'echo $sm_path'".

Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Reviewed-by: Glen Choo <chooglen@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

0 files changed, 0 insertions, 0 deletions