Ability to delete unused Attributes & Filter options

Over the years where I have added products (normally via spreadsheets), I have created too many similar Attributes and Filter Options by making spelling mistakes and or duplications,

So i have for example :

Size

And

SIZE

Or :

Color

And

Colour

I don’t need both offered to me now and it confuses newer staff, my fault in the first place I know !

To delete any unallocated Attribute & Filter Options or just to be able to delete them individually would be a good start,

Cheers,

Alan,