remove length check

cashu/mint/ledger.py

@@ -76,8 +76,6 @@ class Ledger:
     def _verify_secret_criteria(self, proof: Proof):
         if proof.secret is None or proof.secret == "":
             raise Exception("no secret in proof.")
-        if len(proof.secret) < 10:
-            raise Exception("secret too short, must be at least 10 characters.")
         return True
 
     def _verify_proof(self, proof: Proof):

cashu/wallet/wallet.py

@@ -167,7 +167,6 @@ class LedgerAPI:
         ), "number of secrets does not match number of outputs"
         await self._check_used_secrets(secrets)
         payloads, rs = self._construct_outputs(amounts, secrets)
-
         split_payload = SplitPayload(proofs=proofs, amount=amount, output_data=payloads)
         resp = requests.post(
             self.url + "/split",