Remove trailing whitespace

Author: Marcus

DropdownAlert.js

@@ -19,7 +19,7 @@ export default class DropdownAlert extends Component {
   static propTypes = {
     imageSrc: PropTypes.oneOfType([PropTypes.string, PropTypes.number]),
     infoImageSrc: PropTypes.oneOfType([PropTypes.string, PropTypes.number, PropTypes.object]),
-    warnImageSrc: PropTypes.oneOfType([PropTypes.string, PropTypes.number, PropTypes.object ]),
+    warnImageSrc: PropTypes.oneOfType([PropTypes.string, PropTypes.number, PropTypes.object]),
     errorImageSrc: PropTypes.oneOfType([PropTypes.string, PropTypes.number, PropTypes.object]),
     successImageSrc: PropTypes.oneOfType([PropTypes.string, PropTypes.number, PropTypes.object]),
     cancelBtnImageSrc: PropTypes.oneOfType([PropTypes.string, PropTypes.number, PropTypes.object]),