Prevent calling state machines initializer for issuables

Remove the overridden Issuable.initialize patch and prevent
calling overriden initializer on state machines for issues
and merge requests

app/models/concerns/issuable.rb

@@ -148,26 +148,6 @@ module Issuable
 
     strip_attributes :title
 
-    # The state_machine gem will reset the value of state_id unless it
-    # is a raw attribute passed in here:
-    # https://gitlab.com/gitlab-org/gitlab/issues/35746#note_241148787
-    #
-    # This assumes another initialize isn't defined. Otherwise this
-    # method may need to be prepended.
-    def initialize(attributes = nil)
-      if attributes.is_a?(Hash)
-        attr = attributes.symbolize_keys
-
-        if attr.key?(:state) && !attr.key?(:state_id)
-          value = attr.delete(:state)
-          state_id = self.class.available_states[value]
-          attributes[:state_id] = state_id if state_id
-        end
-      end
-
-      super(attributes)
-    end
-
     # We want to use optimistic lock for cases when only title or description are involved
     # http://api.rubyonrails.org/classes/ActiveRecord/Locking/Optimistic.html
     def locking_enabled?

app/models/issue.rb

@@ -77,7 +77,7 @@ class Issue < ApplicationRecord
   attr_spammable :title, spam_title: true
   attr_spammable :description, spam_description: true
 
-  state_machine :state_id, initial: :opened do
+  state_machine :state_id, initial: :opened, initialize: false do
     event :close do
       transition [:opened] => :closed
     end

app/models/merge_request.rb

@@ -103,7 +103,7 @@ class MergeRequest < ApplicationRecord
     super + [:merged, :locked]
   end
 
-  state_machine :state_id, initial: :opened do
+  state_machine :state_id, initial: :opened, initialize: false do
     event :close do
       transition [:opened] => :closed
     end