revert add travis
revert add travis

travis env is ubuntu 12.04 and is too old

This reverts commit d0c277144da4c9f79c534e70920cde3d477325a3.
This reverts commit 72ab8afb62ff8af00e38e77c8fe0a12c25234d42.

ustclug/openvz-daemon,ustclug/openvz-daemon