Stop installing lxc and backported kernel
Stop installing lxc and backported kernel

since we don't use lxc anymore and the kernel is redundant

travis-ci/travis-cookbooks,spurti-chopra/travis-cookbooks,spurti-chopra/travis-cookbooks,ljharb/travis-cookbooks,ljharb/travis-cookbooks,spurti-chopra/travis-cookbooks,ljharb/travis-cookbooks,travis-ci/travis-cookbooks,travis-ci/travis-cookbooks