test: kafka bridge is enterprise only feature

scripts/find-apps.sh

@@ -92,7 +92,6 @@ matrix() {
                 entries+=("$(format_app_entry "$app" 1 emqx-enterprise "$runner")")
                 ;;
             apps/emqx_bridge_kafka)
-                entries+=("$(format_app_entry "$app" 1 emqx "$runner")")
                 entries+=("$(format_app_entry "$app" 3 emqx-enterprise "$runner")")
                 ;;
             apps/emqx_connector)