Revert "Update karma.conf.js"

This reverts commit 95d2fe7.

Author: Bamieh

karma.conf.js

@@ -37,6 +37,7 @@ module.exports = config => {
           .ignore('fs')
           .ignore('path')
           .ignore('supports-color')
+          // .require(path.join(__dirname, 'node_modules', 'buffer'), {expose: 'buffer'})
           .on('bundled', (err, content) => {
             if (!err && bundleDirpath) {
               // write bundle to directory for debugging