Remove by matching EventClient keys

If I have:

```tsx
const client = new EventsClient();
client.on("someEvent", "doThing", () => {})
client.on("someEvent", "doThing", "doThingToSpecificThing", () => {})
```

I should be able to:

```tsx
client.remove("someEvent", "doThing")
```

Which should remove both of those events, matching ("someEvent", "doThing")