Revert "Fix wallet_import_rescan.py: Increase minimum transaction amounts for DigiByte"

This reverts commit e005817.

Author: JaredTate

test/functional/wallet_import_rescan.py

@@ -145,7 +145,7 @@ def check(self, txid=None, amount=None, confirmation_height=None):
 
 
 def get_rand_amount():
-    r = random.uniform(0.01, 1)  # Use much larger minimum for DigiByte
+    r = random.uniform(AMOUNT_DUST, 1)
     return Decimal(str(round(r, 8)))