I am using jira 4.4.4, and want to delete a custom field from one of my field configurations while leaving it in another. I want to do this because jira requires you to set a field to required in order to get rid of the "None" option in a dropdown field. I have it set to Required in one field configuration, but don't even need the field in the other. I've removed it from all screens in the other field configuration and hidden it, but still I have that irritating "None" in the screens I do want it to appear in. How do I fix this?