process: group main thread execution preparation code

This patch groups the preparation of main thread execution into
`prepareMainThreadExecution()` and removes the cluster IPC
setup in worker thread bootstrap since clusters do not use
worker threads for its implementation and it's unlikely to change.

PR-URL: https://github.com/nodejs/node/pull/26000
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Richard Lau <riclau@uk.ibm.com>
Reviewed-By: Minwoo Jung <minwoo@nodesource.com>

1 files changed, 0 insertions, 14 deletions

diff --git a/lib/internal/process/main_thread_only.js b/lib/internal/process/main_thread_only.js
index 0ce063f928..96c57fda35 100644
--- a/lib/internal/process/main_thread_only.js
+++ b/lib/internal/process/main_thread_only.js
@@ -152,22 +152,8 @@ function createSignalHandlers() {
   };
 }
 
-function setupChildProcessIpcChannel() {
-  const assert = require('internal/assert');
-
-  const fd = parseInt(process.env.NODE_CHANNEL_FD, 10);
-  assert(fd >= 0);
-
-  // Make sure it's not accidentally inherited by child processes.
-  delete process.env.NODE_CHANNEL_FD;
-
-  require('child_process')._forkChild(fd);
-  assert(process.send);
-}
-
 module.exports = {
   wrapProcessMethods,
   createSignalHandlers,
-  setupChildProcessIpcChannel,
   wrapPosixCredentialSetters
 };