events: inline createEvent hybrid dispatch closure

Originally added in 16b11cd, it first
had three callers. Now there's only one branch requireing it.
Signed-off-by: Szymon Łągiewka <slagiewka@users.noreply.github.com>
PR-URL: #64473
Reviewed-By: Chemi Atlow <chemi@atlow.co.il>

Author: slagiewka

lib/internal/event_target.js

@@ -791,14 +791,6 @@ class EventTarget {
 }
 
 [kHybridDispatch](nodeValue,type,event){
-constcreateEvent=()=>{
-if(event===undefined){
-event=this[kCreateEvent](nodeValue,type);
-event[kTarget]=this;
-event[kIsBeingDispatched]=true;
-}
-returnevent;
-};
 if(event!==undefined){
 event[kTarget]=this;
 event[kIsBeingDispatched]=true;
@@ -844,7 +836,12 @@ class EventTarget {
 if(handler.isNodeStyleListener){
 arg=nodeValue;
 }else{
-arg=createEvent();
+if(event===undefined){
+event=this[kCreateEvent](nodeValue,type);
+event[kTarget]=this;
+event[kIsBeingDispatched]=true;
+}
+arg=event;
 }
 constcallback=handler.weak ?
 handler.callback.deref() : handler.callback;