meta: remove use of profanity in source

The CoC requests to avoid the casual use of profanity.

PR-URL: https://github.com/nodejs/node/pull/4122


Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: targos - Michaël Zasso <mic.besace@gmail.com>
Reviewed-By: Brian White <mscdex@mscdex.net>