remove extra blank line
diff --git a/src/cryptography/x509.py b/src/cryptography/x509.py
index b48a04d..63c8767 100644
--- a/src/cryptography/x509.py
+++ b/src/cryptography/x509.py
@@ -313,7 +313,6 @@
             return self._decipher_only
 
 
-
 OID_COMMON_NAME = ObjectIdentifier("2.5.4.3")
 OID_COUNTRY_NAME = ObjectIdentifier("2.5.4.6")
 OID_LOCALITY_NAME = ObjectIdentifier("2.5.4.7")