Fix deprecations in admin groups interface

app/assets/javascripts/admin/components/group-member.js.es6

@@ -0,0 +1,9 @@
+export default Ember.Component.extend({
+  classNames: ["item"],
+
+  actions: {
+    remove() {
+      this.sendAction('removeAction', this.get('member'));
+    }
+  }
+});