ServiceWorker cleanup: remove wait_for_activated(); just use wait_for_state()

LayoutTests/http/tests/serviceworker/resources/test-helpers.js

Index: LayoutTests/http/tests/serviceworker/resources/test-helpers.js
diff --git a/LayoutTests/http/tests/serviceworker/resources/test-helpers.js b/LayoutTests/http/tests/serviceworker/resources/test-helpers.js
index c4b9d611044d7373dc4ba2ed0f1d43ea5964596d..dda9a69e3fc65fc2fd2442476ee491d531f4bbbf 100644
--- a/LayoutTests/http/tests/serviceworker/resources/test-helpers.js
+++ b/LayoutTests/http/tests/serviceworker/resources/test-helpers.js
@@ -133,18 +133,6 @@ function wait_for_state(test, worker, state) {
     }));
 }
 
-function wait_for_activated(test, registration) {
-  var expected_state = 'activated';
-  if (registration.active)
-    return wait_for_state(test, registration.active, expected_state);
-  if (registration.waiting)
-    return wait_for_state(test, registration.waiting, expected_state);
-  if (registration.installing)
-    return wait_for_state(test, registration.installing, expected_state);
-  return Promise.reject(
-    new Error('registration must have at least one version'));
-}
-
 // Declare a test that runs entirely in the ServiceWorkerGlobalScope. The |url|
 // is the service worker script URL. This function:
 // - Instantiates a new test with the description specified in |description|.