Deletes all identities from the agent.
.It Fl d
Instead of adding the identity, removes the identity from the agent.
In this case ssh-add requires a public key file. If a public key is
not found in the specified file, ssh-add will try to find one in a
file with the same name but with
.Pa .pub
appended.
.It Fl e Ar reader
Remove key in smartcard
.Ar reader .