ssh: drop unused #include "common/cockpittest.h"
ssh: drop unused #include "common/cockpittest.h"

No installed code should be using any test functions, and indeed, this
file isn't.  Drop the superfluous include.

cockpit-project/cockpit,mvollmer/cockpit,martinpitt/cockpit,mvollmer/cockpit,mvollmer/cockpit,cockpit-project/cockpit,cockpit-project/cockpit,martinpitt/cockpit,mvollmer/cockpit,mvollmer/cockpit,cockpit-project/cockpit,martinpitt/cockpit,martinpitt/cockpit,cockpit-project/cockpit,martinpitt/cockpit