Fix recipients for my_module designation notifications [SCI-9863]

app/models/user_my_module.rb

@@ -9,8 +9,6 @@ class UserMyModule < ApplicationRecord
   belongs_to :my_module, inverse_of: :user_my_modules, touch: true
 
   def log_activity(type_of, current_user)
-    return if current_user.id == user.id
-
     Activities::CreateActivityService
       .call(activity_type: type_of,
             owner: current_user,

app/notifications/recipients/designate_to_my_module_recipients.rb

@@ -7,7 +7,11 @@ module Recipients
     def activity_recipients
       activity = Activity.find(@params[:activity_id])
       user = User.find_by(id: activity.values.dig('message_items', 'user_target', 'id'))
+
+      return [] if user.id == activity.owner_id
+
       [user]
     end
   end
 end
+