diff --git a/kolibri2zim/templates/assets/epub_embed.js b/kolibri2zim/templates/assets/epub_embed.js
index d3c345a..4263162 100644
--- a/kolibri2zim/templates/assets/epub_embed.js
+++ b/kolibri2zim/templates/assets/epub_embed.js
@@ -1,7 +1,5 @@
 var params = URLSearchParams && new URLSearchParams(document.location.search.substring(1));
     var url = params && params.get("url") && decodeURIComponent(params.get("url"));
-    var currentCfi = (params && params.get("cfi")) ? params.get("cfi") : undefined;
-    var currentSectionIndex = (params && params.get("loc")) ? parseInt(params.get("loc")) : undefined;
 
     // Load the opf
     var book = ePub(url);
@@ -12,12 +10,12 @@ var params = URLSearchParams && new URLSearchParams(document.location.search.sub
 
     var displayed = rendition.display();
 
-    displayed.then(function(renderer){
+    displayed.then(function(_){
       // -- do stuff
     });
 
     // Navigation loaded
-    book.loaded.navigation.then(function(toc){
+    book.loaded.navigation.then(function(_){
       // console.log(toc);
     });