Revert "events: add hasEventListener util for validate"

This reverts commit bdb6d12. PR-URL: #56282 Reviewed-By: Luigi Pinca <[email protected]> Reviewed-By: Jason Zhang <[email protected]> Reviewed-By: Jake Yuesong Li <[email protected]>

Author: origranot

lib/events.js

@@ -276,12 +276,6 @@ ObjectDefineProperty(EventEmitter, 'defaultMaxListeners',{
 },
 });
 
-functionhasEventListener(self,type){
-if(type===undefined)
-returnself._events!==undefined;
-returnself._events!==undefined&&self._events[type]!==undefined;
-};
-
 ObjectDefineProperties(EventEmitter,{
 kMaxEventTargetListeners: {
 __proto__: null,
@@ -675,11 +669,13 @@ EventEmitter.prototype.removeListener =
 functionremoveListener(type,listener){
 checkListener(listener);
 
-if(!hasEventListener(this,type))
+constevents=this._events;
+if(events===undefined)
 returnthis;
 
-constevents=this._events;
 constlist=events[type];
+if(list===undefined)
+returnthis;
 
 if(list===listener||list.listener===listener){
 this._eventsCount-=1;
@@ -733,9 +729,9 @@ EventEmitter.prototype.off = EventEmitter.prototype.removeListener;
  */
 EventEmitter.prototype.removeAllListeners=
 functionremoveAllListeners(type){
-if(!hasEventListener(this))
-returnthis;
 constevents=this._events;
+if(events===undefined)
+returnthis;
 
 // Not listening for removeListener, no need to emit
 if(events.removeListener===undefined){
@@ -780,10 +776,14 @@ EventEmitter.prototype.removeAllListeners =
 };
 
 function_listeners(target,type,unwrap){
-if(!hasEventListener(target,type))
+constevents=target._events;
+
+if(events===undefined)
 return[];
 
-constevlistener=target._events[type];
+constevlistener=events[type];
+if(evlistener===undefined)
+return[];
 
 if(typeofevlistener==='function')
 returnunwrap ? [evlistener.listener||evlistener] : [evlistener];