Remove obsolete verbose arguments from packaging.

Logging replaces verbose arguments.  I haven’t fixed the example in
Doc/install/install.rst because I have major fixes and changes to the
oc under way and will fix or remove that example as part of that task.
diff --git a/Lib/packaging/command/test.py b/Lib/packaging/command/test.py
index 5b62a12..4d5348f 100644
--- a/Lib/packaging/command/test.py
+++ b/Lib/packaging/command/test.py
@@ -60,8 +60,7 @@
             self.run_command('build')
             sys.path.insert(0, build.build_lib)
 
-            # Temporary kludge until we remove the verbose arguments and use
-            # logging everywhere
+            # XXX maybe we could pass the verbose argument of pysetup here
             logger = logging.getLogger('packaging')
             verbose = logger.getEffectiveLevel() >= logging.DEBUG
             verbosity = verbose + 1