submodule update: remove "-v" option
In e84c3cf3dc3 (git-submodule.sh: accept verbose flag in cmd_update to be non-quiet, 2018-08-14) the "git submodule update" sub-command was made to understand "-v", but the option was never documented. The only in-tree user has been this test added in 3ad0401e9e6 (submodule update: silence underlying merge/rebase with "--quiet", 2020-09-30), it wasn't per-se testing --quiet, but fixing a bug in e84c3cf3dc3: It used to set "GIT_QUIET=0" instead of unsetting it on "-v", and thus we'd end up passing "--quiet" to "git submodule--helper" on "-v", since the "--quiet" option was passed using the ${parameter:+word} construct. Furthermore, even if someone had used the "-v" option they'd only be getting the default output. Our default in both git-submodule.sh and "git submodule--helper" has been to be "verbose", so the only way this option could have matter is if it were used as e.g.: git submodule --quiet update -v [...] I.e. to undo the effect of a previous "--quiet" on the command-line. Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>