Drop Rob's email address in project config.

We should remove Rob's email address. This gets listed on PyPI and could lead to people sending emails requesting help.

setup.cfg

@@ -5,7 +5,6 @@ description = A configurable set of panels that display various debug informatio
 long_description = file: README.rst
 long_description_content_type = text/x-rst
 author = Rob Hudson
-author_email = rob@cogit8.org
 url = https://github.com/jazzband/django-debug-toolbar
 download_url = https://pypi.org/project/django-debug-toolbar/
 license = BSD