Summary:
Rewrites `NativeEventEmitter` to not extend `EventEmitter` and to compose `RCTDeviceEventEmitter` instead of (mis)using its exported `sharedSubscriber` property.
This makes it easier to reason about `NativeEventEmitter`. Also, the extraneous methods on `EventEmitter` are no longer inherited.
Changelog:
[General][Removed] - `NativeEventEmitter` no longer inherits from `EventEmitter`, so it no longer implements `removeListener` and `removeSubscription`. Instead, use the `remove()` method on the subscription object returned by `addListener`.
Reviewed By: rubennorte
Differential Revision: D26163562
fbshipit-source-id: c1aadb99bdefbaa36fece57ce74604e414f94d4d
Tim Yung
d39643b9de