Removed Chef install from CentOS 6.4 definition.
Removed Puppet install from CentOS 6.4 definition.
Removed Chef install from Debian 7.0 definition.
Removed Puppet install from Debian 7.0 definition.
Removed Ruby Gems installs of Puppet/Chef, removed PATH modifications and removed Puppet system user creation.
Removed gem installation of Chef from Ubuntu 13.04 definition.