test: only suppress starttask.sh output and not sudo

the remote support logic uses sudo output in tests

src/shell.js

@@ -3,9 +3,7 @@
 const assert = require('assert'),
     BoxError = require('./boxerror.js'),
     child_process = require('child_process'),
-    constants = require('./constants.js'),
     debug = require('debug')('box:shell'),
-    fs = require('fs'),
     once = require('./once.js'),
     util = require('util');
 
@@ -101,7 +99,6 @@ function sudo(tag, args, options, callback) {
     let sudoArgs = [ '-S' ]; // -S makes sudo read stdin for password
     if (options.preserveEnv) sudoArgs.push('-E'); // -E preserves environment
     if (options.ipc) sudoArgs.push('--close-from=4'); // keep the ipc open. requires closefrom_override in sudoers file
-    if (constants.TEST) options.logStream = fs.createWriteStream('/dev/null'); // without this output is messed up, not sure why
 
     const cp = spawn(tag, SUDO, sudoArgs.concat(args), options, callback);
     cp.stdin.end();