Remove displayName static property

Author: amanmahajan7

packages/react-data-grid/src/HeaderRow.js

@@ -23,8 +23,6 @@ const HeaderRowStyle  = {
 const knownDivPropertyKeys = ['width', 'height', 'style', 'onScroll'];
 
 class HeaderRow extends React.Component {
-  static displayName = 'HeaderRow';
-
   static propTypes = {
     width: PropTypes.oneOfType([PropTypes.number, PropTypes.string]),
     height: PropTypes.number.isRequired,