test: Simplify test-ssh-add()
test: Simplify test-ssh-add()

free_expected() does nothing else than free(); the `em = NULL;` did not
have any visible effect (as it's the local function argument copy, not
the caller's value). Eliminate it and use `free()` directly.

moraleslazaro/cockpit,andreasn/cockpit,deryni/cockpit,cockpit-project/cockpit,moraleslazaro/cockpit,martinpitt/cockpit,andreasn/cockpit,deryni/cockpit,andreasn/cockpit,martinpitt/cockpit,cockpituous/cockpit,deryni/cockpit,moraleslazaro/cockpit,mvollmer/cockpit,andreasn/cockpit,cockpituous/cockpit,garrett/cockpit,deryni/cockpit,garrett/cockpit,mvollmer/cockpit,martinpitt/cockpit,andreasn/cockpit,andreasn/cockpit,moraleslazaro/cockpit,moraleslazaro/cockpit,garrett/cockpit,mvollmer/cockpit,cockpit-project/cockpit,moraleslazaro/cockpit,moraleslazaro/cockpit,cockpituous/cockpit,cockpituous/cockpit,andreasn/cockpit,garrett/cockpit,deryni/cockpit,deryni/cockpit,deryni/cockpit,cockpituous/cockpit,garrett/cockpit,cockpit-project/cockpit,cockpituous/cockpit,cockpit-project/cockpit,cockpit-project/cockpit,mvollmer/cockpit,mvollmer/cockpit,martinpitt/cockpit,martinpitt/cockpit