Permanently removes multiple rows from an audience in a single bulk operation. Provide an array of rowId values in the request body. All row data and associated cell values are deleted and cannot be recovered. Use this endpoint to clean audiences of outdated, duplicate, or irrelevant records. To delete the entire audience, use the Delete Audience endpoint instead. This operation is asynchronous. Returns 202 Accepted with a jobId. Poll the Get Bulk Job Status endpoint at GET /v1/audiences/{audienceId}/rows/actions/bulk/job/{jobId} using that jobId to confirm all rows have been removed. Returns 400 if the request body is malformed or rowId values are invalid.