Remove update service

ee/lib/ee/gitlab/scim/update_user_service.rb

-# frozen_string_literal: true
-
-module EE
-  module Gitlab
-    module Scim
-      class UpdateUserService
-        def initialize(identity)
-          @identity = identity
-        end
-
-        # rubocop: disable CodeReuse/ActiveRecord
-        def execute(params)
-          parser = EE::Gitlab::Scim::ParamsParser.new(params)
-          parsed_hash = parser.to_hash
-
-          if parser.deprovision_user?
-            destroy_identity(identity)
-          elsif parsed_hash[:extern_uid]
-            identity.update(parsed_hash.slice(:extern_uid))
-          else
-            scim_error!(message: 'Email has already been taken') if email_taken?(parsed_hash[:email], identity)
-
-            result = ::Users::UpdateService.new(identity.user,
-                                                parsed_hash.except(:extern_uid, :provider)
-                                                  .merge(user: identity.user)).execute
-
-            result[:status] == :success
-          end
-        end
-        # rubocop: enable CodeReuse/ActiveRecord
-      end
-    end
-  end
-end