Remove ObjectStorage scenario

qa/qa/scenario/test/integration/object_storage.rb

-# frozen_string_literal: true
-
-module QA
-  module Scenario
-    module Test
-      module Integration
-        class ObjectStorage < Test::Instance::All
-          tags :object_storage
-        end
-      end
-    end
-  end
-end

qa/spec/scenario/test/integration/object_storage_spec.rb

-# frozen_string_literal: true
-
-RSpec.describe QA::Scenario::Test::Integration::ObjectStorage do
-  describe '#perform' do
-    it_behaves_like 'a QA scenario class' do
-      let(:tags) { [:object_storage] }
-    end
-  end
-end