Nope. DU ammunition is still being produced by many countries although only the UK and US have admitted using weapons containing DU. The problem is that DU isn’t covered under any specific treaty.
It is the possible poisonous secondary effects of DU that is the main concern but the acts covering the use of poisons in war specifically exclude ‘nuclear material’ because they are covered under their own treaties. Unfortunately the nuclear treaties aren’t concerned with the poisonous nature of nuclear materials as generally (in the case of Plutonium/Uranium) its the explosive nature and mass-destruction caused that is the primary concern.
BTW, the A10 is only one of the many weapon systems that uses DU ammunition.