Update test/parallel/test-child-process-bad-stdio.js

Co-authored-by: Luigi Pinca <luigipinca@gmail.com>

Author: cjihrig

test/parallel/test-child-process-bad-stdio.js

@@ -5,7 +5,9 @@ const common = require('../common');
 if (process.argv[2] === 'timeout') {
   setTimeout(() => {}, common.platformTimeout(100));
   return;
-} else if (process.argv[2] === 'interval') {
+}
+
+if (process.argv[2] === 'interval') {
   setInterval(() => {}, 10_000);
   return;
 }