bitbake: prserv/cooker: Drop unused param

Drop pointless unused function parameter.

(Bitbake rev: 8104b33656de0b619943bd7a9884eb650ccafbf4)

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

bitbake/lib/prserv/serv.py

@@ -478,7 +478,7 @@ def auto_start(d):
         logger.critical("PRservice %s:%d not available" % (host, port))
         raise PRServiceConfigError
 
-def auto_shutdown(d=None):
+def auto_shutdown():
     global singleton
     if singleton:
         host, port = singleton.getinfo()