remove queue specific options

[bekzod]

as mentioned here emberjs/ember.js#16097

[stefanpenner]

LGTM, likely will be a major release?

cc @rwjblue / @krisselden

[rwjblue]

The changes look good, but I'd like to wait for a bit on landing this.

Ember has committed to ensuring that the ember-2-legacy addon will provide all Ember 2.x APIs through Ember 3.4 (as a way to extend the time apps have to migrate off of Ember 2.x APIs a bit). If we land this now and release a major version bump, we will be forced to maintain two versions for a few months.

[stefanpenner]

@rwjblue should we fork a 2-release branch for 2x stuff? Or hold off for a-bit first.

[rwjblue]

There are some larger things in the works that I'd like to land for current Ember versions, and having to maintain both branches will be somewhat annoying...

Maybe we can keep master as 2.x and make a next branch where we can target further cleanup that can be used in Ember after 3.4?

[bekzod]

rebased in case

[bekzod]

@rwjblue maybe we can merge this ? since before after no longer used in ember