Set the new default of sign_out_via config

test/devise_test.rb

@@ -35,24 +35,6 @@ class DeviseTest < ActiveSupport::TestCase
     end
   end
 
-  test 'setup block warns about defaults changing' do
-    Devise.app_set_configs = Set.new
-
-    ActiveSupport::Deprecation.expects(:warn).with() { |value| value =~ /sign_out_via/ }
-
-    Devise.setup do
-    end
-  end
-
-  test 'setup block doest not warns when the change is explicit set' do
-    ActiveSupport::Deprecation.expects(:warn).never
-
-    swap Devise, sign_out_via: :get do
-      Devise.setup do
-      end
-    end
-  end
-
   test 'stores warden configuration' do
     assert_kind_of Devise::Delegator, Devise.warden_config.failure_app
     assert_equal :user, Devise.warden_config.default_scope