fixup

Author: juanarbol

doc/api/child_process.md

@@ -1403,16 +1403,9 @@ const { spawn } = require('child_process');
 
 const subprocess = spawn('ls');
 
-const ioStdout = subprocess.stdio[1];
-
-// This is the same of listening to ioStdout data event
 subprocess.stdout.on('data', (data) => {
   console.log(`Received chunk ${data}`);
 });
-
-ioStdout.on('data', (data) => {
-  console.log(`Received chunk ${data}`);
-});
 ```
 
 ### subprocess.unref()