code: public void delete(String name) throws IOException {
          if (name.equalsIgnoreCase(ISSUER)) {
              names = null;
          } else {
              throw new IOException("Attribute name not recognized by " +
                  "CertAttrSet:CertificateIssuer");
          }
          encodeThis();
      }
docs: Deletes the attribute value.
  
  @throws IOException on error