Remove section about commercial support

Manuel told me that Qafoo doesn't do any commercial support for PHPMD, anymore.

src/site/rst/support/index.rst

@@ -22,19 +22,7 @@ Issue-Tracker
   think you found a bug or you have a feature request for future
   versions of PHPMD.
 
-Commercial support
-==================
-
-There are also companies providing commercial support for PHPMD:
-
-- `Qafoo GmbH - passion for software quality`__
-
-  Founded by me, the lead developer of PHPMD, and two friends, Qafoo
-  provides support for PHPMD and general consulting and training on
-  software quality tools and processes.
-
 __ irc://irc.freenode.net/#phpmd
 __ irc://irc.freenode.net/#phpmd
 __ http://freenode.net
 __ https://github.com/phpmd/phpmd/issues
-__ http://qafoo.com