net: remove hot path comment from connect

This comment was added with an assumption that we could determine the
IP address that localhost should resolve to without performing a
lookup. This was a false assumption and should be removed.

PR-URL: nodejs#4648
Reviewed-By: Brian White <mscdex@mscdex.net>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>

lib/net.js

@@ -931,7 +931,6 @@ function lookupAndConnect(self, options) {
   port |= 0;
 
   // If host is an IP, skip performing a lookup
-  // TODO(evanlucas) should we hot path this for localhost?
   var addressType = exports.isIP(host);
   if (addressType) {
     process.nextTick(function() {