Removing CCK fields results in error

To reproduce this:

1) add an arbitrary field to a content type and save. Confirm that this field appears in the workflow_fields table.

2) Go back to the content type and remove the field you just created and save.

3) Create a new node of this content type

4) See watchdog logs, and you will see a warning such as: 'Could not find field "field_bogus_ignore_me" while altering the view'

field values are preserved in the workflow_fields table even after they are deleted from a content type. So workflow_fields expects to see these values in the content type even though they don't exist.