Migrate logstash frontend to KP

x-pack/index.js

@@ -11,7 +11,6 @@ import { reporting } from './legacy/plugins/reporting';
 import { security } from './legacy/plugins/security';
 import { tilemap } from './legacy/plugins/tilemap';
 import { dashboardMode } from './legacy/plugins/dashboard_mode';
-import { logstash } from './legacy/plugins/logstash';
 import { beats } from './legacy/plugins/beats_management';
 import { apm } from './legacy/plugins/apm';
 import { maps } from './legacy/plugins/maps';
@@ -43,7 +42,6 @@ module.exports = function(kibana) {
     security(kibana),
     tilemap(kibana),
     dashboardMode(kibana),
-    logstash(kibana),
     beats(kibana),
     apm(kibana),
     maps(kibana),