'crictl rm(p) -af' display help when there is nothing to delete

[champtar]

What happened:

Using

crictl rmp -af
crictl rm -af

display the help menu when there are no containers/pods left to delete

What you expected to happen:

either display nothing or a message saying that there is nothing to delete

How to reproduce it (as minimally and precisely as possible):

run crictl rm -af twice

Anything else we need to know?:

Environment:

• Container runtime or hardware configuration: containerd 1.7.0 / crictl 1.26.0

[saschagrunert]

@champtar good point, do you mind opening a PR to fix that behavior?

[champtar]

@saschagrunert #1147