Remove another error expectation

Author: backspace

packages/host/app/lib/externals.ts

@@ -6,7 +6,6 @@ import * as emberModifier from '@ember/modifier';
 import * as emberObject from '@ember/object';
 import * as emberObjectInternals from '@ember/object/internals';
 import * as emberTemplate from '@ember/template';
-//@ts-expect-error
 import * as emberTemplateFactory from '@ember/template-factory';
 import * as glimmerComponent from '@glimmer/component';
 import * as glimmerTracking from '@glimmer/tracking';