Deleting attributes with 2 valid values and the rest missing

For some reason the other day, I can't remember why, I had to delete attributes with two valid values and all the rest missing. It followed on from this process.

So I made this process that finds all attributes with a specific number of valid values and removes them (the attributes).

This example uses sample data so deletes attributes with 7 valid values but I'm sure you'll get the idea.