remove unused ember-exam

Author: mansona

package.json

@@ -88,7 +88,6 @@
     "ember-concurrency": "^2.3.7",
     "ember-data": "~3.28.6",
     "ember-data-fastboot": "https://github.com/cardstack/ember-data-fastboot#6e6fb8bbf0b405ae174160cc1e4833c5582f68cd",
-    "ember-exam": "^1.0.0",
     "ember-export-application-global": "^2.0.1",
     "ember-fetch": "^8.1.1",
     "ember-inflector": "^3.0.0",

pnpm-lock.yaml

@@ -4,8 +4,6 @@ import * as QUnit from 'qunit';
 import { setApplication } from '@ember/test-helpers';
 import { setup } from 'qunit-dom';
 import { start } from 'ember-qunit';
-import loadEmberExam from 'ember-exam/test-support/load';
-loadEmberExam();
 setApplication(Application.create(config.APP));
 
 setup(QUnit.assert);