Use one controller for all notification readings

app/controllers/notifications_controller.rb

@@ -6,14 +6,4 @@ class NotificationsController < ApplicationController
       @unread = Current.user.notifications.unread.ordered
     end
   end
-
-  def mark_read
-    @notification = Current.user.notifications.find(params[:id])
-    @notification.update!(read_at: Time.current)
-
-    respond_to do |format|
-      format.html { redirect_back fallback_location: notifications_path }
-      format.turbo_stream
-    end
-  end
 end