remove unused import

x-pack/plugins/ingest_manager/public/applications/ingest_manager/components/alpha_messaging.tsx

@@ -3,7 +3,7 @@
  * or more contributor license agreements. Licensed under the Elastic License;
  * you may not use this file except in compliance with the Elastic License.
  */
-import React, { memo } from 'react';
+import React from 'react';
 import styled from 'styled-components';
 import { FormattedMessage } from '@kbn/i18n/react';
 import { EuiText } from '@elastic/eui';