Clean-up RemoveSuggestion and related codes

components/password_manager/core/browser/password_autofill_manager.cc

Index: components/password_manager/core/browser/password_autofill_manager.cc
diff --git a/components/password_manager/core/browser/password_autofill_manager.cc b/components/password_manager/core/browser/password_autofill_manager.cc
index 3100bddf4e6f0101715f8781cb68e6253c8cdd30..6aa0418e00ff0f66948f26ba44bac450b28244d2 100644
--- a/components/password_manager/core/browser/password_autofill_manager.cc
+++ b/components/password_manager/core/browser/password_autofill_manager.cc
@@ -258,8 +258,8 @@ bool PasswordAutofillManager::GetDeletionConfirmationText(
 
 bool PasswordAutofillManager::RemoveSuggestion(const base::string16& value,
                                                int identifier) {
-  // http://crbug.com/329038
-  NOTIMPLEMENTED();
+  // Password suggestions cannot be deleted this way.
+  // See http://crbug.com/329038#c15
   return false;
 }