Don't imply tests can be run directly without pytest

Author: akx

tests/database_test.py

@@ -1,6 +1,3 @@
-#!/usr/bin/env python
-
-
 import ipaddress
 import re
 import unittest

tests/models_test.py

@@ -377,7 +377,3 @@ def test_german(self) -> None:
         assert (
             model.continent.name == "Nordamerika"
         ), "Correct german name for continent"
-
-
-if __name__ == "__main__":
-    unittest.main()

tests/webservice_test.py

@@ -1,5 +1,3 @@
-#!/usr/bin/env python
-
 import asyncio
 import copy
 import ipaddress
@@ -357,7 +355,3 @@ def run_client(self, v):
 
 
 del TestBaseClient
-
-
-if __name__ == "__main__":
-    unittest.main()