fix: Dummy app hitting recently added assertion (#188)

tests/dummy/app/initializers/remove-default-title.js

@@ -0,0 +1,22 @@
+/**
+ * This is here just for dummy app.
+ *
+ * Without it we would hit assertion from service:page-title-list
+ * because of our app/index.html has 2 <title> elements due to Fastboot.
+ *
+ * But having 2 <title> elements is intentional so we can acceptance test both
+ * browser and Fastboot scenarios together.
+ */
+export function initialize(/* application */) {
+  if (typeof FastBoot === 'undefined') {
+    let titleElements = document.head.getElementsByTagName('title');
+    let defaultTitle = titleElements.item(0);
+    if (defaultTitle && titleElements.length > 1) {
+      defaultTitle.parentElement.removeChild(defaultTitle);
+    }
+  }
+}
+
+export default {
+  initialize
+};