Loki: Remove param (#19854)

public/app/plugins/datasource/loki/datasource.ts

@@ -173,10 +173,6 @@ export class LokiDatasource extends DataSourceApi<LokiQuery, LokiOptions> {
    * This returns a bit different dataFrame than runQueries as it returns single dataframe even if there are multiple
    * Loki streams, sets only common labels on dataframe.labels and has additional dataframe.fields.labels for unique
    * labels per row.
-   *
-   * @param options
-   * @param observer Callback that will be called with new data. Is optional but only because we run this function
-   * even if there are no live targets defined in the options which would mean this is noop and observer is not called.
    */
   runLiveQuery = (options: DataQueryRequest<LokiQuery>, target: LokiQuery): Observable<DataQueryResponse> => {
     const liveTarget = this.prepareLiveTarget(target, options);