fix: remove f prefix

Author: andrew-virtuals

python/x402/src/x402/fastapi/middleware.py

@@ -223,9 +223,9 @@ def x402_response(error: str):
                         custom_facilitator_response = await client.post(url, headers=headers)
                         custom_facilitator_response.raise_for_status()
                         custom_facilitator_succeeded = True
-                        logger.info(f"Custom facilitator settle succeeded")
+                        logger.info("Custom facilitator settle succeeded")
                 except Exception as e:
-                    logger.warning(f"Custom facilitator settle POST failed: {e}, falling back to default facilitator")
+                    logger.warning("Custom facilitator settle POST failed: {e}, falling back to default facilitator")
                     custom_facilitator_succeeded = False
 
             # Fallback to default facilitator if custom facilitator wasn't used or failed
@@ -251,7 +251,7 @@ def x402_response(error: str):
                             if isinstance(data, dict) and "transactionHash" in data:
                                 transaction_hash = data["transactionHash"]
                 except (AttributeError, KeyError, ValueError, httpx.DecodeError) as e:
-                    logger.warning(f"Failed to extract transactionHash from custom facilitator response: {e}")
+                    logger.warning("Failed to extract transactionHash from custom facilitator response: {e}")
 
                 settle_response = SettleResponse(
                     success=True,