feat: remove useless import

Signed-off-by: SuZhou-Joe <[email protected]>

src/core/server/utils/workspace.ts

@@ -8,7 +8,6 @@
  * The best practice would be using {@link Server.register} to register plugins into the hapi server
  * but OSD is wrappering the hapi server and the hapi server instance
  */
-import { Server } from '@hapi/hapi';
 import { PluginsStates } from '@hapi/hapi';
 import { OpenSearchDashboardsRequest, ensureRawRequest } from '../http/router';