cluster: remove use of bind() in destroy()

This commit replaces process.exit.bind() with an arrow function in Worker.prototype.destroy(). PR-URL: #6502 Reviewed-By: Colin Ihrig <[email protected]> Reviewed-By: James M Snell <[email protected]>

Author: yorkie

lib/cluster.js

@@ -684,10 +684,12 @@ function workerInit(){
 
 Worker.prototype.destroy=function(){
 this.exitedAfterDisconnect=true;
-if(!this.isConnected())process.exit(0);
-varexit=process.exit.bind(null,0);
-send({act: 'exitedAfterDisconnect'},()=>process.disconnect());
-process.once('disconnect',exit);
+if(!this.isConnected()){
+process.exit(0);
+}else{
+send({act: 'exitedAfterDisconnect'},()=>process.disconnect());
+process.once('disconnect',()=>process.exit(0));
+}
 };
 
 functionsend(message,cb){