process: remove dead code

PR-URL: #18330
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Joyee Cheung <joyeec9h3@gmail.com>
Reviewed-By: Jon Moss <me@jonathanmoss.me>

lib/internal/process.js

@@ -227,14 +227,7 @@ function setupChannel() {
     // Make sure it's not accidentally inherited by child processes.
     delete process.env.NODE_CHANNEL_FD;
 
-    const cp = require('child_process');
-
-    // Load tcp_wrap to avoid situation where we might immediately receive
-    // a message.
-    // FIXME is this really necessary?
-    process.binding('tcp_wrap');
-
-    cp._forkChild(fd);
+    require('child_process')._forkChild(fd);
     assert(process.send);
   }
 }