Remove unnecessary default props

js/components/ascribe_buttons/acls/acl_button.js

@@ -36,12 +36,6 @@ let AclButton = React.createClass({
         className: React.PropTypes.string
     },
 
-    getDefaultProps() {
-        return {
-            buttonAcceptClassName: ''
-        };
-    },
-
     // Removes the acl_ prefix and converts to upper case
     sanitizeAction() {
         if (this.props.buttonAcceptName) {

js/components/ascribe_forms/acl_form_factory.js

@@ -31,12 +31,6 @@ let AclFormFactory = React.createClass({
         showNotification: React.PropTypes.bool
     },
 
-    getDefaultProps() {
-        return {
-            showNotification: false
-        };
-    },
-
     isPiece() {
         return this.props.pieceOrEditions.constructor !== Array;
     },