`zone.js` added `removeAllListeners` and `eventListeners` methods in `EventTarget.prototype`, but those methods only exists when user import `zone.js` and also enables `EventTarget` monkey patching.
If user:
1. Does not import `zone.js` and uses `noop` zone when bootstrapping Angular app. OR
2. Disable monkey patching of `EventTarget` patch by defining `__Zone_disable_EventTarget = true`.
Then `removeAllListeners` and `eventListeners` methods will not be present.
PR Close#35954
54634628ac