## Is your feature request related to a problem?

As a team accumulates data, they will have events/properties that are no longer in use that clutter their app.

Example from our team:
![image](https://user-images.githubusercontent.com/148820/143202334-42d73ab6-13be-4661-ba7a-83c86788b9e8.png)


## Describe the solution you'd like

Under event/properties stats allow 'hiding' events/properties from view.

## Describe alternatives you've considered

Alternatively, go the route of "verified" events/properties (as He@p) does - show those first. See also https://help.heap.io/category/heap-administration/data-governance/

## Additional context

Note: Existing reports, etc should still work well even with 'removed' events/properties.

Related: https://github.com/PostHog/posthog/issues/7126

#### *Thank you* for your feature request – we love each and every one!

posthog/api/event_definition.py
id = self.kwargs["id"]
        if EE_AVAILABLE and self.request.user.organization.is_feature_available(AvailableFeature.INGESTION_TAXONOMY):  
            from ee.models.event_definition import EnterpriseEventDefinition
            enterprise_event = EnterpriseEventDefinition.objects.filter(id=id).first()
            if enterprise_event:
                return enterprise_event
            non_enterprise_event = EventDefinition.objects.get(id=id)
            new_enterprise_event = EnterpriseEventDefinition(
                eventdefinition_ptr_id=non_enterprise_event.id, description=""
            )
            new_enterprise_event.__dict__.update(non_enterprise_event.__dict__)
            new_enterprise_event.save()
            return new_enterprise_event
        return EventDefinition.objects.get(id=id)
    def get_serializer_class(self) -> Type[serializers.ModelSerializer]:
        serializer_class = self.serializer_class
        if EE_AVAILABLE and self.request.user.organization.is_feature_available(AvailableFeature.INGESTION_TAXONOMY):  
            from ee.api.ee_event_definition import EnterpriseEventDefinitionSerializer
            serializer_class = EnterpriseEventDefinitionSerializer  
        return serializer_class