Avoid setuptools warning

Patch from: Mike Bonnet <mikeb@redhat.com>

Change-Id: Ia1e97422867df55686985f6cb44c000a1322531b

SetupConfig.py

@@ -29,6 +29,7 @@ classifiers = [line.strip() for line in '''\
   Topic :: Software Development :: Libraries :: Python Modules
   Topic :: Software Development :: User Interfaces
   Topic :: Text Processing'''.splitlines() if not line.strip().startswith('#')]
+del line
 
 package_dir = {'Cheetah':'cheetah'}