remove callbacks_shared_secret from example
remove callbacks_shared_secret from example

zachgersh/concourse,cjcjameson/concourse,cjcjameson/concourse,sedouard/concourse,sedouard/concourse,holgero/concourse,CloudCredo/concourse,holgero/concourse,concourse/concourse,zachgersh/concourse,CloudCredo/concourse,squeedee/concourse,squeedee/concourse,longnguyen11288/concourse,Amit-PivotalLabs/concourse,holgero/concourse,cjcjameson/concourse,squeedee/concourse,concourse/concourse,beni55/concourse,concourse/concourse,jbayer/concourse,Amit-PivotalLabs/concourse,beni55/concourse,sedouard/concourse,jbayer/concourse,concourse/concourse,zachgersh/concourse,concourse/concourse,longnguyen11288/concourse,longnguyen11288/concourse,beni55/concourse,CloudCredo/concourse,jbayer/concourse,Amit-PivotalLabs/concourse