Revert "require amq/protocol from amq/client/version, too"
Revert "require amq/protocol from amq/client/version, too"

This reverts commit bce9ce7a8ea1f697e1209acb3ee47013a86093b7.

See previous commit for explanation.

travis-repos/amq-client,travis-repos/amq-client,ruby-amqp/amq-client,ruby-amqp/amq-client