misc,python: Run pre-commit run --all-files

Applies the `pyupgrade` hook to all files in the repo.

Change-Id: I9879c634a65c5fcaa9567c63bc5977ff97d5d3bf

ext/testlib/loader.py

@@ -110,7 +110,7 @@ def path_as_modulename(filepath):
 
 
 def path_as_suitename(filepath):
-    return os.path.split(os.path.dirname(os.path.abspath((filepath))))[-1]
+    return os.path.split(os.path.dirname(os.path.abspath(filepath)))[-1]
 
 
 def _assert_files_in_same_dir(files):
@@ -121,7 +121,7 @@ def _assert_files_in_same_dir(files):
                 assert os.path.dirname(f) == directory
 
 
-class Loader(object):
+class Loader:
     """
     Class for discovering tests.