Remove index from CountBase

[passabilities]

When I need to remove an element from an array fetched from CountBase there is no clear way to do this. I'm able to set an element to null in the array and then shift elements to the correct index but the config for a CountBase is setup to only increment the length of a bucket as seen here

@bruscantini won't let me assign you to the issue for some reason

[paullinator]

You are correct and the specification for countbase does not allow deletion of elements. Doing so would incur a large performance hit. What is the condition where you would need to delete an element?

[passabilities]

Removing a UTXO

[paullinator]

@passabilities Those should go in a rangebase not a countbase. Although admittedly we do not have a way of removing an item from the rangebase but we should add it

@bruscantini would you be open to adding a remove() method to rangebase?