code: public DeleteMediaResourceResponse deleteMediaResource(String mediaId) {
          DeleteMediaResourceRequest request = new DeleteMediaResourceRequest().withMediaId(mediaId);
          return deleteMediaResource(request);
      }
docs: Delete the specific media resource managed by VOD service.
  <p>
  The caller <i>must</i> authenticate with a valid BCE Access Key / Private Key pair.
  
  @param mediaId The unique ID for each media resource
  @return empty response will be returned