Remove unused import helper

src/home-assistant.js

@@ -14,7 +14,6 @@ import './layouts/login-form.js';
 import './managers/notification-manager.js';
 import './resources/ha-style.js';
 import './resources/html-import/polyfill.js';
-import './resources/panel-imports.js';
 import './util/ha-pref-storage.js';
 import './util/hass-call-api.js';
 import './util/hass-translation.js';

src/resources/panel-imports.js

@@ -1,4 +0,0 @@
-import '@polymer/app-layout/app-header-layout/app-header-layout.js';
-import '@polymer/app-layout/app-header/app-header.js';
-import '@polymer/app-layout/app-toolbar/app-toolbar.js';
-