selftests/bpf: Reject unsupported -k option in vmtest.sh

vmtest.sh does not document a -k option and does not handle it in the
getopts case statement. However, the getopts optstring includes k, which
causes the script to accept -k silently instead of reporting it as an
invalid option.

Remove k from the optstring so unsupported options are rejected through
the existing invalid-option path.

Fixes: c9709f52386d ("bpf: Helper script for running BPF presubmit tests")
Signed-off-by: Roman Kvasnytskyi <roman@kvasnytskyi.net>
Acked-by: Paul Chaignon <paul.chaignon@gmail.com>
Link: https://lore.kernel.org/r/20260516120625.80839-1-roman@kvasnytskyi.net
Signed-off-by: Alexei Starovoitov <ast@kernel.org>

0 files changed, 0 insertions, 0 deletions