chore: remove unused helper and fix formatting

Author: ovx

altcha/altcha.py

@@ -737,14 +737,3 @@ def solve_challenge(
             return Solution(n, took)
 
     return None
-
-def _normalize_expires(expires: datetime.datetime | None) -> datetime.datetime | None:
-    if expires is None:
-        return None
-
-    # Case 1: naive datetime → assume UTC (backward compatibility)
-    if expires.tzinfo is None:
-        return expires.replace(tzinfo=timezone.utc)
-
-    # Case 2: aware datetime (any timezone) → convert to UTC
-    return expires.astimezone(timezone.utc)

setup.py

@@ -2,7 +2,7 @@
 
 setup(
     name="altcha",
-    version="0.2.0",
+    version="1.0.0",
     description="A library for creating and verifying challenges for ALTCHA.",
     long_description=open("README.md").read(),
     long_description_content_type="text/markdown",