It looks like some things have changed since the last time I wanted to delete fields form an attribute table. I used "add join" to add a csv table to a feature class. I wish to remove what I have added to try something different. However, I can't seem to get it to work. If I use the "delete field" tool, it only shows fields that were original to the feature class. I then tried to delete the fields from the attribute table, but no action is taken when I select the field and click delete.
ArcGIS Pro 2.8.3