events: remove unreachable code

Commit 8d386ed stopped the
Event Emitter implementation from storing arrays containing a
single listener. This change left a section of code in
removeListener() as unreachable. This commit removes the
unreachable code.
Refs: #12043
PR-URL: #12501
Backport-PR-URL: #13796
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>

Author: cjihrig

lib/events.js

@@ -349,22 +349,13 @@ EventEmitter.prototype.removeListener =
 if(position<0)
 returnthis;
 
-if(list.length===1){
-if(--this._eventsCount===0){
-this._events=newEventHandlers();
-returnthis;
-}else{
-deleteevents[type];
-}
-}elseif(position===0){
+if(position===0)
 list.shift();
-if(list.length===1)
-events[type]=list[0];
-}else{
+else
 spliceOne(list,position);
-if(list.length===1)
-events[type]=list[0];
-}
+
+if(list.length===1)
+events[type]=list[0];
 
 if(events.removeListener)
 this.emit('removeListener',type,originalListener||listener);