Fix OpenStruct use in import_url_params_spec

.rubocop_manual_todo.yml

@@ -2576,7 +2576,6 @@ Style/OpenStructUse:
     - 'lib/mattermost/session.rb'
     - 'spec/bin/feature_flag_spec.rb'
     - 'spec/controllers/admin/clusters_controller_spec.rb'
-    - 'spec/controllers/concerns/import_url_params_spec.rb'
     - 'spec/controllers/groups/clusters_controller_spec.rb'
     - 'spec/controllers/import/fogbugz_controller_spec.rb'
     - 'spec/controllers/import/gitlab_controller_spec.rb'

spec/controllers/concerns/import_url_params_spec.rb

@@ -4,7 +4,7 @@ require 'spec_helper'
 
 RSpec.describe ImportUrlParams do
   let(:import_url_params) do
-    controller = OpenStruct.new(params: params).extend(described_class)
+    controller = double('controller', params: params).extend(described_class)
     controller.import_url_params
   end