Revert "add unzip cookbook as for https://github.com/everpeace/vagrant-mesos/pull/6#issuecomment-33150413"

This reverts commit 9bc420c33c90173d8511bf84fbd05a9875c77a36.

It's because that unzip installation was added to cookbook.
see everpeace/cookbook-mesos@c5e48e5822de651830c96b7cee29cca8944da3f7