style: Remove commented mirage config for managed groups

addons/api/mirage/config.js

@@ -524,19 +524,6 @@ export default function () {
   this.get('/managed-groups/:id');
   this.del('/managed-groups/:id');
   this.post('/managed-groups');
-  // this.post(
-  //   '/managed-groups/:idMethod',
-  //   function ({ managedGroups }, { params: { idMethod } }) {
-  //     const attrs = this.normalizedRequestAttrs();
-  //     const id = idMethod.split(':')[0];
-  //     const managedGroup = managedGroups.find(id);
-  //     const updatedAttrs = {
-  //       version: attrs.version,
-  //       attributes: managedGroup.attributes,
-  //     };
-  //     return managedGroup.update(updatedAttrs);
-  //   }
-  // );
 
   /* Uncomment the following line and the Response import above
    * Then change the response code to simulate error responses.