events: emit removeListener event when last listener is removed

When the last listener is removed and _eventsCount becomes 0,
the removeListener event was not being emitted because the check
was inside the else block. This moves the removeListener emission
outside the conditional to ensure it always fires when a listener
is removed.

Author: Han5991

lib/events.js

@@ -687,9 +687,10 @@ EventEmitter.prototype.removeListener =
           this._events = { __proto__: null };
         } else {
           delete events[type];
-          if (events.removeListener)
-            this.emit('removeListener', type, list.listener || listener);
         }
+
+        if (events.removeListener !== undefined)
+          this.emit('removeListener', type, list.listener || listener);
       } else if (typeof list !== 'function') {
         let position = -1;