fix missing method

app/models/session.rb

@@ -11,13 +11,6 @@ class Session < ApplicationRecord
   validates :ref_id, uniqueness: { scope: :conference_id }
 
   after_update :notify_if_changed
-  after_update_commit -> {
-    Rails.logger.debug("session update commit")
-    broadcast_replace_to "sessions",
-      target: helpers.dom_id(@session),
-      partial: "sessions/session",
-      locals: { session: @session }
-  }
 
   self.implicit_order_column = :starts_at