Another issue related to #9206 and #11884.

CLDR has an interesting inconsistency, it doesn't include deprecated/dissolved countries (like Yugoslavia, Czechoslovakia, etc), but it includes exactly 139 deprecated currencies.

This makes the shipped currency list very impractical for ecommerce purposes, since the dropdown offered to the user/admin includes 139 irrelevant entries.
For example, 5 yugoslavian dinars (Yugoslavia dissolved 20 years ago), several currencies that were only used in the 1992-1995 wars, etc.
It also increases the size of the shipped data, since those 139 entries also have translations in every locale.

The ISO list of currencies doesn't include deprecated currencies, so I suggest flagging any CLDR currencies not present in the ISO list as "deprecated", and updating the listing methods to not return deprecated currencies by default.