Remove spurious newline

Even though some python styles suggest there should be multiple newlines between
methods/classes, for consistency with the surrounding code, it's best to be
consistent by having merely one newline between each functional block.

MFC after:	1 week

tests/sys/opencrypto/cryptodev.py

@@ -524,7 +524,6 @@ def __next__(self):
 
             yield values
 
-
 def _spdechex(s):
     return binascii.hexlify(''.join(s.split()))