Remove superfluous specs

Neither `if` nor `ENV` need to be tested by us...

spec/controllers/application_controller_spec.rb

@@ -33,46 +33,5 @@ describe ApplicationController, type: :controller do
         end
       end
     end
-
   end
-
-end
-
-describe ApplicationController, type: :request do
-  let(:conference) { create(:conference) }
-
-  describe 'Skylight link' do
-
-    around do |example|
-      original_value = ENV['SKYLIGHT_PUBLIC_DASHBOARD_URL']
-      example.run
-      ENV['SKYLIGHT_PUBLIC_DASHBOARD_URL'] = original_value
-    end
-
-    context 'when SKYLIGHT_PUBLIC_DASHBOARD_URL is set' do
-      before do
-        ENV['SKYLIGHT_PUBLIC_DASHBOARD_URL'] = 'https://oss.skylight.io/app/applications/my-osem'
-      end
-
-      it 'should include a link to view performance data' do
-        get '/'
-        expect(response.body).to match(/Performance data/i)
-        expect(response.body).to include('https://oss.skylight.io/app/applications/my-osem')
-      end
-    end
-
-    context 'when SKYLIGHT_PUBLIC_DASHBOARD_URL is not set' do
-      before do
-        ENV['SKYLIGHT_PUBLIC_DASHBOARD_URL'] = nil
-      end
-
-      it 'should not include a link to view performance data' do
-        get '/'
-        expect(response.body).to_not match(/performance data/i)
-        expect(response.body).to_not match(/skylight/i)
-      end
-    end
-
-  end
-
 end

spec/helpers/application_helper_spec.rb

@@ -68,11 +68,6 @@ describe ApplicationHelper, type: :helper do
         expect(nav_root_link_for(nil)).to match 'OSEM'
       end
 
-      it 'should use the environment variable' do
-        ENV['OSEM_NAME'] = Faker::Company.name + "'"
-        expect(nav_root_link_for(nil)).to match h(ENV['OSEM_NAME'])
-      end
-
       it 'should use the conference organization name' do
         expect(nav_root_link_for(conference)).to match h(conference.organization.name)
       end