Remove old ignore_column in AR models

Next models are affected:
* Project
* Namespace
* Issue
* Merge request
* CI Trigger
* CI Pipeline schedule

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

app/models/ci/pipeline_schedule.rb

@@ -4,11 +4,8 @@ module Ci
   class PipelineSchedule < ApplicationRecord
     extend Gitlab::Ci::Model
     include Importable
-    include IgnorableColumn
     include StripAttribute
-    ignore_column :deleted_at
-
     belongs_to :project
     belongs_to :owner, class_name: 'User'
     has_one :last_pipeline, -> { order(id: :desc) }, class_name: 'Ci::Pipeline'

app/models/ci/trigger.rb

@@ -3,11 +3,8 @@
 module Ci
   class Trigger < ApplicationRecord
     extend Gitlab::Ci::Model
-    include IgnorableColumn
     include Presentable
-    ignore_column :deleted_at
-
     belongs_to :project
     belongs_to :owner, class_name: "User"

app/models/issue.rb

@@ -13,11 +13,8 @@ class Issue < ApplicationRecord
   include RelativePositioning
   include TimeTrackable
   include ThrottledTouch
-  include IgnorableColumn
   include LabelEventable
-  ignore_column :assignee_id, :branch_name, :deleted_at
-
   DueDateStruct                   = Struct.new(:title, :name).freeze
   NoDueDate                       = DueDateStruct.new('No Due Date', '0').freeze
   AnyDueDate                      = DueDateStruct.new('Any Due Date', '').freeze

app/models/merge_request.rb

@@ -7,7 +7,6 @@ class MergeRequest < ApplicationRecord
   include Noteable
   include Referable
   include Presentable
-  include IgnorableColumn
   include TimeTrackable
   include ManualInverseAssociation
   include EachBatch
@@ -24,10 +23,6 @@ class MergeRequest < ApplicationRecord
   SORTING_PREFERENCE_FIELD = :merge_requests_sort
-  ignore_column :locked_at,
-                :ref_fetched,
-                :deleted_at
-
   belongs_to :target_project, class_name: "Project"
   belongs_to :source_project, class_name: "Project"
   belongs_to :merge_user, class_name: "User"

app/models/namespace.rb

@@ -8,13 +8,10 @@ class Namespace < ApplicationRecord
   include AfterCommitQueue
   include Storage::LegacyNamespace
   include Gitlab::SQL::Pattern
-  include IgnorableColumn
   include FeatureGate
   include FromUnion
   include Gitlab::Utils::StrongMemoize
-  ignore_column :deleted_at
-
   # Prevent users from creating unreasonably deep level of nesting.
   # The number 20 was taken based on maximum nesting level of
   # Android repo (15) + some extra backup.

app/models/project.rb

@@ -31,7 +31,6 @@ class Project < ApplicationRecord
   include FeatureGate
   include OptionallySearch
   include FromUnion
-  include IgnorableColumn
   extend Gitlab::Cache::RequestCache
   extend Gitlab::ConfigHelper
@@ -56,8 +55,6 @@ class Project < ApplicationRecord
   VALID_MIRROR_PORTS = [22, 80, 443].freeze
   VALID_MIRROR_PROTOCOLS = %w(http https ssh git).freeze
-  ignore_column :import_status, :import_jid, :import_error
-
   cache_markdown_field :description, pipeline: :description
   delegate :feature_available?, :builds_enabled?, :wiki_enabled?,