Remove TODOs for bug 159166

The bug tracked adding viewing of passwords to iOS settings. There
were two remaining TODOs:
* An outdated comment in a test.
* A refactoring suggestion for trading off code complexity for test
  complexity (add a delegate API to make a particular EG test a unit
  test).

The refactoring suggestion does not seem justified -- the current EG
tests are stable and working well.

Therefore this CL removes both TODOs.

Bug: 159166
Cq-Include-Trybots: master.tryserver.chromium.mac:ios-simulator-cronet;master.tryserver.chromium.mac:ios-simulator-full-configs
Change-Id: I20658b94b4fa190a2ffa442af6f9f7b4ec1aeed4
Reviewed-on: https://chromium-review.googlesource.com/892818Reviewed-by: Eric Noyau <noyau@chromium.org>
Commit-Queue: Vaclav Brozek <vabr@chromium.org>
Cr-Commit-Position: refs/heads/master@{#533251}

ios/chrome/browser/ui/settings/password_details_collection_view_controller.mm

@@ -480,8 +480,6 @@ reauthenticationModule:(id<ReauthenticationProtocol>)reauthenticationModule {
 // Show a MD snack bar with |message| and provide haptic feedback. The haptic
 // feedback is either for success or for error, depending on |success|.
 - (void)showToast:(NSString*)message forSuccess:(BOOL)success {
-  // TODO(crbug.com/159166): Route this through some delegate API to be able
-  // to mock it in the unittest, and avoid having an EGTest just for that?
   TriggerHapticFeedbackForNotification(success
                                            ? UINotificationFeedbackTypeSuccess
                                            : UINotificationFeedbackTypeError);

ios/chrome/browser/ui/settings/passwords_settings_egtest.mm

@@ -47,9 +47,6 @@
 // password_details_collection_view_controller_unittest.mm. Very simple
 // integration tests and features which are not currently unittestable should
 // go here, the rest into the unittest.
-// This test only uses the new UI which allows viewing passwords.
-// TODO(crbug.com/159166): Remove the above sentence once the new UI is the
-// default one.
 
 using autofill::PasswordForm;
 using chrome_test_util::ButtonWithAccessibilityLabel;