code: public void removeChild(final String child) {
          final StringBuilder htmlMiddleSB = getHtmlMiddleSB();
          final String sb = htmlMiddleSB.toString();
          final String replaced = sb.replace(child, "");
          final int lastIndex = htmlMiddleSB.length() - 1;
          htmlMiddleSB.delete(0, lastIndex);
          htmlMiddleSB.append(replaced);
      }
docs: removes the the child content.
  
  @param child
  @since 1.0.0
  @author WFF