Remove unnecessary ts-expect-error

Co-authored-by: Seth Michael Larson <seth.larson@elastic.co>

Author: github-actions[bot]

src/helpers.ts

@@ -229,7 +229,6 @@ export default class Helpers {
           rest_total_hits_as_int: params.rest_total_hits_as_int,
           scroll_id
         }, options as TransportRequestOptionsWithMeta)
-        // @ts-expect-error
         response = r as TransportResult<T.ScrollResponse<TDocument, TAggregations>, unknown>
         assert(response !== undefined, 'The response is undefined, please file a bug report')
         if (response.statusCode !== 429) break