diff --git a/src/playground/render-gui.jsx b/src/playground/render-gui.jsx
index 6a2fc75e1..fe94f5bc7 100644
--- a/src/playground/render-gui.jsx
+++ b/src/playground/render-gui.jsx
@@ -1,21 +1,12 @@
 import PropTypes from 'prop-types';
 import React from 'react';
 import {connect} from 'react-redux';
-import {compose} from 'redux';
 import GUI from '../containers/gui.jsx';
-import TWParserHOC from '../lib/tw-parser-hoc.jsx';
-import AppStateHOC from '../lib/app-state-hoc.jsx';
 
 const onClickLogo = () => {
-    // remove the hash to load the default project
     location.hash = '';
 };
 
-if (process.env.NODE_ENV === 'production' && typeof window === 'object') {
-    // Warn before navigating away
-    window.onbeforeunload = () => true;
-}
-
 const searchParams = new URLSearchParams(location.search);
 const cloudHost = searchParams.get('cloud_host') || 'wss://clouddata.turbowarp.org';
 
diff --git a/src/playground/render-interface.jsx b/src/playground/render-interface.jsx
index 73b869070..d8dfc58b0 100644
--- a/src/playground/render-interface.jsx
+++ b/src/playground/render-interface.jsx
@@ -16,15 +16,9 @@ import Examples from '../components/tw-examples/examples.jsx';
 import styles from './gui.css';
 
 const onClickLogo = () => {
-    // remove the hash to load the default project
     location.hash = '';
 };
 
-if (process.env.NODE_ENV === 'production' && typeof window === 'object') {
-    // Warn before navigating away
-    window.onbeforeunload = () => true;
-}
-
 const Interface = ({isPlayerOnly}) => (
     <div className={classNames(isPlayerOnly ? styles.stageOnly : styles.editor)}>
         {isPlayerOnly ? (
@@ -70,9 +64,6 @@ const ConnectedInterface = connect(
     mapDispatchToProps
 )(Interface);
 
-// note that redux's 'compose' function is just being used as a general utility to make
-// the hierarchy of HOC constructor calls clearer here; it has nothing to do with redux's
-// ability to compose reducers.
 const WrappedInterface = compose(
     AppStateHOC,
     TWParserHOC