diff --git a/js/app.js b/js/app.js
index ca2df1c6..d1215fa3 100644
--- a/js/app.js
+++ b/js/app.js
@@ -11,27 +11,6 @@ import ApiUrls from './constants/api_urls';
 import routes from './routes';
 import fetch from './utils/fetch';
 
-/*
-    Taken from
-    http://stackoverflow.com/questions/30613447/how-to-debug-reactjss-setstate?noredirect=1#comment49301874_30613447
-
-    <remove this in production>
-
-*/
-
-var warn = console.warn;
-console.warn = function(warning) {
-  if (/(setState)/.test(warning)) {
-    throw new Error(warning);
-  }
-  warn.apply(console, arguments);
-};
-
-/*
-    </remove this in production>
-
- */
-
 fetch.defaults({
     urlMap: ApiUrls,
     http: {
diff --git a/js/components/ascribe_piece_list_bulk_modal/piece_list_bulk_modal.js b/js/components/ascribe_piece_list_bulk_modal/piece_list_bulk_modal.js
index 207eb97e..2cf32139 100644
--- a/js/components/ascribe_piece_list_bulk_modal/piece_list_bulk_modal.js
+++ b/js/components/ascribe_piece_list_bulk_modal/piece_list_bulk_modal.js
@@ -35,6 +35,7 @@ let PieceListBulkModal = React.createClass({
 
     componentWillUnmount() {
         EditionListStore.unlisten(this.onChange);
+        UserStore.unlisten(this.onChange);
     },
 
     fetchSelectedPieceEditionList() {
diff --git a/js/mixins/form_mixin.js b/js/mixins/form_mixin.js
index b0d161c8..9f5312fe 100644
--- a/js/mixins/form_mixin.js
+++ b/js/mixins/form_mixin.js
@@ -19,7 +19,7 @@ export const FormMixin = {
         this.clearErrors();
         fetch
             .post(this.url(), { body: this.getFormData() })
-            .then(response => this.props.handleSuccess())
+            .then(() => this.props.handleSuccess())
             .catch(this.handleError);
     },