fix code style

fdroid

@@ -1,5 +1,5 @@
 #!/usr/bin/env python3
-# 
+#
 # fdroid.py - part of the FDroid server tools
 # Copyright (C) 2020 Michael Pöhn <michael.poehn@fsfe.org
 #

tests/main.TestCase

@@ -1,14 +1,10 @@
 #!/usr/bin/env python3
 
 import inspect
-import logging
 import optparse
 import os
-import shutil
 import sys
 import unittest
-import tempfile
-import textwrap
 from unittest import mock
 
 localmodule = os.path.realpath(