Remove ‘-u’ from masterd shebang

This is not needed anymore - the original change was more than a year
ago when masterd was in its incipient phase.

Signed-off-by: Iustin Pop <iustin@google.com>
Reviewed-by: Michael Hanselmann <hansmi@google.com>

daemons/ganeti-masterd

-#!/usr/bin/python -u
+#!/usr/bin/python
 #
 
 # Copyright (C) 2006, 2007 Google Inc.