Merge branch '352544-remove-ignore_column-directive' into 'master'

Remove ignore_column directive

See merge request gitlab-org/gitlab!83051

app/models/project_setting.rb

 # frozen_string_literal: true
 
 class ProjectSetting < ApplicationRecord
-  include IgnorableColumns
-
-  ignore_column :show_diff_preview_in_email, remove_with: '14.10', remove_after: '2022-03-22'
-
   belongs_to :project, inverse_of: :project_setting
 
   enum squash_option: {