repl: remove redundant initialization

PR-URL: #26562
Reviewed-By: Ruben Bridgewater <[email protected]>
Reviewed-By: Luigi Pinca <[email protected]>

Author: gengjiawen

lib/repl.js

@@ -1030,8 +1030,7 @@ function complete(line, callback) {
 
   // REPL commands (e.g. ".break").
   var filter;
-  var match = null;
-  match = line.match(/^\s*\.(\w*)$/);
+  let match = line.match(/^\s*\.(\w*)$/);
   if (match) {
     completionGroups.push(Object.keys(this.commands));
     completeOn = match[1];