drop timezone from test_dashboard output

I'm sure we could make a regex that works everywhere,
but is it really worth the trouble?

Author: alexcjohnson

tasks/util/common.js

@@ -44,8 +44,7 @@ exports.doesFileExist = function(filePath) {
 exports.formatTime = function(date) {
     return [
         date.toLocaleDateString(),
-        date.toLocaleTimeString(),
-        date.toString().match(/\(([A-Za-z\s\u4E00-\u9FCC].*)\)/)[1]  // fix Chinese datetime string error. #1630
+        date.toLocaleTimeString()
     ].join(' ');
 };