diff --git a/cashu/core/crypto.py b/cashu/core/crypto.py
index 8fcb496..6cad72b 100644
--- a/cashu/core/crypto.py
+++ b/cashu/core/crypto.py
@@ -6,20 +6,6 @@ from cashu.core.secp import PrivateKey, PublicKey
 from cashu.core.settings import MAX_ORDER
 
 
-def derivation_path_newer_than(d1: str, d2: str):
-    """
-    Returns whether derivation path d1 is newer (deeper down the derivation tree)
-    than d2. Used for treating tokens with old keysets differently.
-    """
-    # NOTE: Derivation paths are still just simple integers for now. This function needs
-    # to change once we upgrade to BIP32.
-
-    # the very first derivation path was "" (empty string) so anything is newer than itself
-    if d1 == "" and d2 != "":
-        return False
-    return int(d1) > int(d2)
-
-
 def derive_keys(master_key: str, derivation_path: str = ""):
     """
     Deterministic derivation of keys for 2^n values.