chore: undo change to spawn code

Author: remy

lib/monitor/run.js

@@ -99,8 +99,6 @@ function run(options) {
   if (shouldFork) {
     var forkArgs = cmd.args.slice(1);
     var env = utils.merge(options.execOptions.env, process.env);
-    stdio.pop();
-    stdio.push(process.stderr);
     stdio.push('ipc');
     child = fork(options.execOptions.script, forkArgs, {
       env: env,