remove key subcommand behaves indifferently when an YubiHSM is attached

[dixia]

This issue is probably related to keosd and cleos

Issue description:

With a YubiHSM attached, remove_key subcommand does not report an error when a user attempt to remove a key pair. Given the assumption that the remove_key command is not supported with YubiHSM, this is an unexpected behaviour

Environment：

• eos version 1.8.1

Reproduce steps:

• attached a yubihsm
• create a key in the yubihsm wallet
• remove key:

cleos wallet remove_key -n YubiHSM {PUBLIC_KEY} --password {PASSSWORD}