replication: remove code duplication

Author: lonvia

scripts/osm2pgsql-replication

@@ -127,7 +127,7 @@ def compute_database_date(conn, schema, prefix):
     LOG.debug("Found timestamp %s", date)
 
     try:
-        date = dt.datetime.strptime(date, '%Y-%m-%dT%H:%M:%SZ').replace(tzinfo=dt.timezone.utc)
+        date = dt.datetime.strptime(date, '%Y-%m-%dT%H:%M:%SZ')
     except ValueError:
         LOG.fatal("Cannot parse timestamp '%s'", date)
         return None