diff --git a/web/app.js b/web/app.js
index 4581cc1e0..832dc1be4 100644
--- a/web/app.js
+++ b/web/app.js
@@ -236,11 +236,6 @@ let PDFViewerApplication = {
     if ('verbosity' in hashParams) {
       AppOptions.set('verbosity', hashParams['verbosity'] | 0);
     }
-    if ((typeof PDFJSDev === 'undefined' || !PDFJSDev.test('PRODUCTION')) &&
-        hashParams['disablebcmaps'] === 'true') {
-      AppOptions.set('cMapUrl', '../external/cmaps/');
-      AppOptions.set('cMapPacked', false);
-    }
     if ('textlayer' in hashParams) {
       switch (hashParams['textlayer']) {
         case 'off':