func-tests: remove redundant file parameter

tests-extra/tests/ddns/prereq/test.py

@@ -7,7 +7,7 @@ from dnstest.test import Test
 t = Test()
 
 srv = t.server("knot")
-zone = t.zone("ddns.", "ddns.zone", local=True)
+zone = t.zone("ddns.", local=True)
 
 t.link(zone, srv, ddns=True)
 

tests-extra/tests/records/obsolete/test.py

@@ -8,7 +8,7 @@ t = Test()
 
 master = t.server("bind")
 slave = t.server("knot")
-zone = t.zone("obsolete.", "obsolete.zone", local=True)
+zone = t.zone("obsolete.", local=True)
 
 t.link(zone, master, slave)