tests-extra/dnsheader: remove timeout and tries dig parameters

tests-extra/tests/security/dnsheader/test.py

 #!/usr/bin/env python3
 
-'''DNS packet header parsing tests. '''
+'''DNS packet header parsing tests.'''
 
 import socket
 from dnstest.test import Test
@@ -21,11 +21,11 @@ data = '\x00'
 max_len = (12 + 5) # Header + minimal question size
 udp_socket = knot.create_sock(socket.SOCK_DGRAM)
 for i in range(1, max_len):
-	knot.send_raw(data * i, udp_socket)
+    knot.send_raw(data * i, udp_socket)
 udp_socket.close()
 
-# Check if the server is still alive 
-resp = knot.dig("example.com", "SOA", timeout=5, tries=1)
+# Check if the server is still alive
+resp = knot.dig("example.com", "SOA")
 resp.check(rcode="NOERROR")
 
 t.end()