chore: cleanup all legacy test blueprints support

BREAKING CHANGE: drops all support for pre-[RFC 0232][rfc] blueprints,
since these have long since been replaced.

Note that this commit also removes the component blueprints entirely, in
favor of landing updated versions of them in [another PR][pr].

[rfc]: https://emberjs.github.io/rfcs/0232-simplify-qunit-testing-api.html
[pr]: #213

blueprints/acceptance-test/mocha-files/tests/acceptance/__name__-test.ts

@@ -1,24 +1,13 @@
-import { describe, it, beforeEach, afterEach } from 'mocha';
+import { describe, it } from 'mocha';
 import { expect } from 'chai';
-import startApp from '<%= dasherizedPackageName %>/tests/helpers/start-app';
-<% if (destroyAppExists) { %>import destroyApp from '<%= dasherizedPackageName %>/tests/helpers/destroy-app';<% } else { %>import { run } from '@ember/runloop';<% } %>
+import { setupApplicationTest } from 'ember-mocha';
+import { visit, currentURL } from '@ember/test-helpers';
 
 describe('<%= friendlyTestName %>', function() {
-  let application;
+  setupApplicationTest();
 
-  beforeEach(function() {
-    application = startApp();
-  });
-
-  afterEach(function() {
-    <% if (destroyAppExists) { %>destroyApp(application);<% } else { %>run(application, 'destroy');<% } %>
-  });
-
-  it('can visit /<%= dasherizedModuleName %>', function() {
-    visit('/<%= dasherizedModuleName %>');
-
-    return andThen(() => {
-      expect(currentURL()).to.equal('/<%= dasherizedModuleName %>');
-    });
+  it('can visit /<%= dasherizedModuleName %>', async function() {
+    await visit('/<%= dasherizedModuleName %>');
+    expect(currentURL()).to.equal('/<%= dasherizedModuleName %>');
   });
 });

blueprints/acceptance-test/qunit-files/tests/acceptance/__name__-test.ts

@@ -1,12 +1,13 @@
-import { test } from 'qunit';
-import moduleForAcceptance from '<%= testFolderRoot %>/tests/helpers/module-for-acceptance';
+import { module, test } from 'qunit';
+import { visit, currentURL } from '@ember/test-helpers';
+import { setupApplicationTest } from 'ember-qunit';
 
-moduleForAcceptance('<%= friendlyTestName %>');
+module('<%= friendlyTestName %>', function(hooks) {
+  setupApplicationTest(hooks);
 
-test('visiting /<%= dasherizedModuleName %>', function(assert) {
-  visit('/<%= dasherizedModuleName %>');
+  test('visiting /<%= dasherizedModuleName %>', async function(assert) {
+    await visit('/<%= dasherizedModuleName %>');
 
-  andThen(function() {
     assert.equal(currentURL(), '/<%= dasherizedModuleName %>');
   });
 });

blueprints/adapter-test/mocha-files/tests/unit/__path__/__test__.ts

@@ -3,14 +3,11 @@ import { describe, it } from 'mocha';
 import { setupTest } from 'ember-mocha';
 
 describe('<%= friendlyTestDescription %>', function() {
-  setupTest('adapter:<%= dasherizedModuleName %>', {
-    // Specify the other units that are required for this test.
-    // needs: ['serializer:foo']
-  });
+  setupTest();
 
   // Replace this with your real tests.
   it('exists', function() {
-    let adapter = this.subject();
+    let adapter = this.owner.lookup('adapter:<%= dasherizedModuleName %>');
     expect(adapter).to.be.ok;
   });
 });

blueprints/adapter-test/qunit-files/tests/unit/__path__/__test__.ts

@@ -1,12 +1,12 @@
-import { moduleFor, test } from 'ember-qunit';
+import { module, test } from 'qunit';
+import { setupTest } from 'ember-qunit';
 
-moduleFor('adapter:<%= dasherizedModuleName %>', '<%= friendlyTestDescription %>', {
-  // Specify the other units that are required for this test.
-  // needs: ['serializer:foo']
-});
+module('<%= friendlyTestDescription %>', function(hooks) {
+  setupTest(hooks);
 
-// Replace this with your real tests.
-test('it exists', function(assert) {
-  let adapter = this.subject();
-  assert.ok(adapter);
+  // Replace this with your real tests.
+  test('it exists', function(assert) {
+    let adapter = this.owner.lookup('adapter:<%= dasherizedModuleName %>');
+    assert.ok(adapter);
+  });
 });