diff --git a/assets/resources/scriptlets.js b/assets/resources/scriptlets.js
index c4207507c..b7702bcd0 100644
--- a/assets/resources/scriptlets.js
+++ b/assets/resources/scriptlets.js
@@ -27,8 +27,6 @@
 (function() {
 // >>>> start of private namespace
 'use strict';
-// This a private safe available for use by all injected scriptlets.
-const uBOSafe = new Map();  // jshint ignore: line
 
 
 
diff --git a/src/js/scriptlet-filtering.js b/src/js/scriptlet-filtering.js
index cde4b93a6..b1cd51419 100644
--- a/src/js/scriptlet-filtering.js
+++ b/src/js/scriptlet-filtering.js
@@ -396,7 +396,6 @@
         out.unshift(
             '(function() {',
             '// >>>> start of private namespace',
-            'const uBOSafe = new Map();',
             '',
         );
         out.push(