code: function cleanStyles(e) {
    if (!e) return;
  
  
    // Remove any root styles, if we're able.
    if (typeof e.removeAttribute == 'function' && e.className != 'readability-styled') e.removeAttribute('style');
  
    // Go until there are no more child nodes
    var cur = e.firstChild;
    while (cur) {
      if (cur.nodeType == 1) {
        // Remove style attribute(s) :
        if (cur.className != "readability-styled") {
          cur.removeAttribute("style");
        }
        cleanStyles(cur);
      }
      cur = cur.nextSibling;
    }
  }
docs: Remove the style attribute on every e and under.
  
  @param Element
  @return void