Because this is only necessary in the main thread.
Also removes the rearming of signal events since no
signal event handlers should be created during the execution
of node.js now that we've made the creation of stdout and stderr
streams lazy - this has been demonstrated in the test coverage.
PR-URL: https://github.com/nodejs/node/pull/26227
Reviewed-By: Richard Lau <riclau@uk.ibm.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Anna Henningsen <anna@addaleax.net>
34470b0524