Remove BBQ, Beer, Silver and Gold as available sponsor slots
Remove BBQ, Beer, Silver and Gold as available sponsor slots


Former-commit-id: f66aeb12d9bb9c4017ebcda5ad0efeecbfc5b4d9
joelaha/devopsdays-web,joelaha/devopsdays-web,masteinhauser/devopsdays-web,benjohnson77/devopsdays-web,benjohnson77/devopsdays-web,joelaha/devopsdays-web,masteinhauser/devopsdays-web,masteinhauser/devopsdays-web,benjohnson77/devopsdays-web,benjohnson77/devopsdays-web,masteinhauser/devopsdays-web,joelaha/devopsdays-web