remove unused import

Author: Bamieh

x-pack/test/usage_collection/test_suites/stack_management_usage/index.ts

@@ -4,7 +4,6 @@
  * you may not use this file except in compliance with the Elastic License.
  */
 
-import expect from '@kbn/expect';
 import _ from 'lodash';
 import { FtrProviderContext } from '../../ftr_provider_context';
 import { stackManagementSchema } from '../../../../../src/plugins/kibana_usage_collection/server/collectors/management/schema';