readline: remove unneeded eslint-disable comment

Remove a comment disabling an ESLint rule that is not triggered by the
code anyway.

PR-URL: nodejs#11836
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Yuta Hiroto <hello@about-hiroppy.com>
Reviewed-By: Teddy Katz <teddy.katz@gmail.com>
Reviewed-By: Michaël Zasso <targos@protonmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Franziska Hinkelmann <franziska.hinkelmann@gmail.com>

Author: Trott

lib/internal/readline.js

@@ -1,7 +1,6 @@
 'use strict';
 
 // Regex used for ansi escape code splitting
-// eslint-disable-next-line no-control-regex
 // Adopted from https://github.com/chalk/ansi-regex/blob/master/index.js
 // License: MIT, authors: @sindresorhus, Qix-, and arjunmehta
 // Matches all ansi escape code sequences in a string