Remove uselss code

lib/tools/redownload/redownload.js

@@ -426,10 +426,6 @@ var Redownload = function() {
 
         requests.forEach(function(req) {
             if (req.weightCheck.bodySize > 0 && fileMinifier.entryTypeCanBeMinified(req) && req.weightCheck.isOptimized === false) {
-                var before = req.weightCheck.afterGzipCompression || req.weightCheck.bodySize;
-                var after = req.weightCheck.afterOptimizationAndGzipCompression || req.weightCheck.optimized;
-                var gain = before - after;
-
                 var before, after;
 
                 if (req.weightCheck.isCompressed === true) {