Steps to reproduce the issue

• Set some "Radio Values" in the "Fields - Radio" plugin. Eg like this:
  
• Create a new radio field and set some Radio Values there as well. Eg
  
• Edit an article and check the radio field options
  

Expected result

Personally I would expect the settings from the field override the ones from the plugin, getting a radio with only "Foo" in my case.

Actual result

The values from the field and plugin are merged together, resulting in three options (No, Yes, Foo).

System information (as much as possible)

Current staging

Additional comments

Of course this is somewhat a subjective view based on what the use case will be.
I imagined one would create generic Yes/No values in the plugin options which will fit for most radio (checkboxes and list) fields. If I need a field with different options I can then just specify them in the field and replace the ones from the plugin.

Pinging @laoneo