ember-classic scenario will stop working soon

[chancancode]

ember-cli/blueprints/addon/files/addon-config/ember-try.js

Lines 63 to 77 in 7f38e72

	{
	name: 'ember-classic',
	env: {
	EMBER_OPTIONAL_FEATURES: JSON.stringify({
	'application-template-wrapper': true,
	'default-async-observers': false,
	'template-only-glimmer-components': false,
	}),
	},
	npm: {
	ember: {
	edition: 'classic',
	},
	},
	},

I believe the classic option is deprecated/removed for 4.0, so we will probably have to pin this scenario to 3.28 or something.

[rwjblue]

I think the best thing to do here, is to also have that scenario pin to ember-source@^3.28.0. For now, addons should still be testing against 3.24 / 3.28; so having a "classic" scenario does seem correct.

[bertdeblock]

Can be closed since #9659 is merged?

[kategengler]

I think so, thanks!