Remove redundant shebangs

Remove redundant shebangs from files that are not used as scripts.

https://fedorahosted.org/freeipa/ticket/3853

ipaserver/advise/base.py

@@ -1,4 +1,3 @@
-#!/usr/bin/python
 # Authors: Tomas Babej <tbabej@redhat.com>
 #
 # Copyright (C) 2013  Red Hat

ipaserver/install/ipa_backup.py

@@ -1,5 +1,4 @@
-#!/usr/bin/python
-# Authors: Rob Crittenden <rcritten@redhat.com
+# Authors: Rob Crittenden <rcritten@redhat.com>
 #
 # Copyright (C) 2013  Red Hat
 # see file 'COPYING' for use and warranty information

ipaserver/install/ipa_ldap_updater.py

@@ -1,4 +1,3 @@
-#!/usr/bin/python
 # Authors: Rob Crittenden <rcritten@redhat.com>
 #          Petr Viktorin <pviktori@redhat.com>
 #

ipaserver/install/ipa_replica_prepare.py

@@ -1,4 +1,3 @@
-#!/usr/bin/python
 # Authors: Karl MacMillan <kmacmillan@mentalrootkit.com>
 #          Petr Viktorin <pviktori@redhat.com>
 #

ipaserver/install/ipa_restore.py

@@ -1,5 +1,4 @@
-#!/usr/bin/python
-# Authors: Rob Crittenden <rcritten@redhat.com
+# Authors: Rob Crittenden <rcritten@redhat.com>
 #
 # Copyright (C) 2013  Red Hat
 # see file 'COPYING' for use and warranty information