test: Drop unnecessary check_journal_messages()
test: Drop unnecessary check_journal_messages()

This gets run in tearDown() anyway, it makes zero sense to run it
manually at the end of a test. (Unlike in check-shutdown-restart where
it happens in the middle of a test before a reboot.)

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