code: public void deleteFileFromTask(String jobId, String taskId, String fileName) throws BatchErrorException, IOException {
          deleteFileFromTask(jobId, taskId, fileName, null, null);
      }
docs: Deletes the specified file from the specified task's directory on its compute node.
  
  @param jobId The ID of the job containing the task.
  @param taskId The ID of the task.
  @param fileName The name of the file to delete.
  @throws BatchErrorException Exception thrown when an error response is received from the Batch service.
  @throws IOException Exception thrown when there is an error in serialization/deserialization of data sent to/received from the Batch service.