remove unused variables

Author: rlidwka

lib/readline.js

@@ -964,16 +964,11 @@ exports.emitKeypressEvents = emitKeypressEvents;
 
 // Regexes used for ansi escape code splitting
 const metaKeyCodeReAnywhere = /(?:\x1b)([a-zA-Z0-9])/;
-const metaKeyCodeRe = new RegExp('^' + metaKeyCodeReAnywhere.source + '$');
 const functionKeyCodeReAnywhere = new RegExp('(?:\x1b+)(O|N|\\[|\\[\\[)(?:' + [
   '(\\d+)(?:;(\\d+))?([~^$])',
   '(?:M([@ #!a`])(.)(.))', // mouse
   '(?:1;)?(\\d+)?([a-zA-Z])'
 ].join('|') + ')');
-const functionKeyCodeRe = new RegExp('^' + functionKeyCodeReAnywhere.source);
-const escapeCodeReAnywhere = new RegExp([
-  functionKeyCodeReAnywhere.source, metaKeyCodeReAnywhere.source, /\x1b./.source
-].join('|'));
 
 
 function* emitKeys(stream) {