Fix metrics key selection.

Author: sebadoom

src/website/metrics-api-key.js

@@ -1,3 +1,5 @@
-export default PRODUCTION ?
+const key = (typeof PRODUCTION !== 'undefined') && PRODUCTION ?
   '693wciz6BgZdlmW0qDlbgxpyj7gtVxRR' :
   'xBxBArADMejN3aqs9NhISky9PHPXIr80';
+
+export default key;

webpack.website-dev.js

@@ -14,8 +14,5 @@ module.exports = merge(common, {
     path: __dirname + '/dist/website/js'
   },
   plugins: [
-    new webpack.DefinePlugin({
-      PRODUCTION: false
-    })
   ]
 });