* run latest vndr so as to collect more LICENSE files
* remove unused packages
* vendor github.com/philhofer/fwd with LICENSE.md (MIT)
* vendor github.com/bsphere/le_go with LICENSE (MIT)
Signed-off-by: Akihiro Suda <suda.akihiro@lab.ntt.co.jp>
Upstream-commit: 5a1b06d7fd6a0c8722a4f7aee1edf46d8e2a115b
Component: engine