Maintenance: GMail skip without present ENVs does not work because channel is created before.

spec/requests/integration/gmail_spec.rb

@@ -1,6 +1,6 @@
 require 'rails_helper'
 RSpec.describe 'Gmail XOAUTH2' do # rubocop:disable RSpec/DescribeClass
-  let!(:channel) do
+  let(:channel) do
     create(:channel,
            area:    'Google::Account',
            options: {