Why is 'Remove' greyed out or missing?
You want to delete a section/category but the remove option is showing but will not work
As a safety feature, when 'Remove' shows and is greyed out, missing or non-responsive it is telling you that there something within the item/section that you are trying to delete may be in use.
Do some digging to determine what you may lose and make any adjustments so that you can the item/section is no-longer in use.
Once complete, the system will display the remove option