Remove deadcode from `service/opts.go`, `SecretOpt`
Remove deadcode from `service/opts.go`, `SecretOpt`

`SecretOpt` is in the `opts` package, this one is never used, so it's
dead code, removing it 👼.

Signed-off-by: Vincent Demeester <87e1f221a672a14a323e57bb65eaea19d3ed3804@sbr.pm>

dnephin/cli,dnephin/cli,ashfall/cli,cpuguy83/cli,gdevillele/cli,e11137/cli,thaJeztah/cli,docker/cli,allencloud/cli,docker/cli,riyazdf/cli,redpanda/cli,ashfall/cli,Zebrilee/cli,Zebrilee/cli,e11137/cli,redpanda/cli,riyazdf/cli,cpuguy83/cli,allencloud/cli,thaJeztah/cli