lib: Drop obsolete FontAwesome CSS from journal.css
lib: Drop obsolete FontAwesome CSS from journal.css

Commit bae0552330 converted these from FontAwesome spans to to PF4
icons.

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