Fix flake8

cibuildwheel/__main__.py

@@ -202,7 +202,6 @@ def main():
         before_test=before_test,
         dependency_constraints=dependency_constraints,
         manylinux_images=manylinux_images
-        
     )
 
     # Python is buffering by default when running on the CI platforms, giving problems interleaving subprocess call output with unflushed calls to 'print'

cibuildwheel/macos.py

@@ -181,7 +181,7 @@ def build(options: BuildOptions):
             dependency_constraint_flags = [
                 '-c', options.dependency_constraints.get_for_python_version(config.version)
             ]
-        
+
         env = setup_python(config, dependency_constraint_flags, options.environment)
 
         # run the before_build command

cibuildwheel/util.py

@@ -1,5 +1,4 @@
 import os
-import sys
 import urllib.request
 from fnmatch import fnmatch
 from time import sleep

unit_test/main_tests/main_options_test.py

@@ -164,7 +164,7 @@ def test_test_extras(test_extras, platform_specific, platform, intercepted_build
 
     main()
 
-    assert intercepted_build_args.args[0],test_extras == ('[' + test_extras + ']' if test_extras else '')
+    assert intercepted_build_args.args[0].test_extras == ('[' + test_extras + ']' if test_extras else '')
 
 
 @pytest.mark.parametrize('test_command', [None, 'test --command'])