Update public/js/add_content.js

public/js/add_content.js

@@ -74,10 +74,6 @@ function addcontent(item) {
 
     // Salam: 
     // Add this line to define sdgImageHTML
-    var sdgImageHTML = '';
-
-    // ...
-
     var sdgProjectHTML = '';
     if ('sdgImage' in item.item) {
     var sdgProjectLink = item.item.sdgImage;