lib: Remove cockpit-components-listing.jsx - its' not used anywhere
lib: Remove cockpit-components-listing.jsx - its' not used anywhere

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