Revert "FIX: always trigger the ':user_updated' event"

This reverts commit 519b70ea46.

https://meta.discourse.org/t/creating-a-topic-or-a-post-sends-the-user-updated-webhook/71643

app/models/user.rb

@@ -108,7 +108,6 @@ class User < ActiveRecord::Base
   after_save :expire_old_email_tokens
   after_save :index_search
   after_commit :trigger_user_created_event, on: :create
-  after_commit :trigger_user_updated_event, on: :update
 
   before_destroy do
     # These tables don't have primary keys, so destroying them with activerecord is tricky:
@@ -1098,11 +1097,6 @@ class User < ActiveRecord::Base
     true
   end
 
-  def trigger_user_updated_event
-    DiscourseEvent.trigger(:user_updated, self)
-    true
-  end
-
   def set_should_validate_email
     if self.primary_email
       self.primary_email.should_validate_email = should_validate_email_address?

app/services/user_updater.rb

@@ -122,6 +122,7 @@ class UserUpdater
       end
     end
 
+    DiscourseEvent.trigger(:user_updated, user) if saved
     saved
   end
 

spec/models/user_spec.rb

@@ -91,15 +91,12 @@ describe User do
       user.approve(admin)
     end
 
-    it 'triggers extensibility events' do
+    it 'triggers a extensibility event' do
       user && admin # bypass the user_created event
-      user_updated_event, user_approved_event = DiscourseEvent.track_events { user.approve(admin) }
+      event = DiscourseEvent.track_events { user.approve(admin) }.first
 
-      expect(user_updated_event[:event_name]).to eq(:user_updated)
-      expect(user_updated_event[:params].first).to eq(user)
-
-      expect(user_approved_event[:event_name]).to eq(:user_approved)
-      expect(user_approved_event[:params].first).to eq(user)
+      expect(event[:event_name]).to eq(:user_approved)
+      expect(event[:params].first).to eq(user)
     end
 
     context 'after approval' do