Revert "added some more low level decoder"

This reverts commit 1b89357bb2518bb7482a6f316403a9fa67da2a80.

Conflicts:
	src/CMakeLists.txt
Revert "register ip over pppoe"

This reverts commit 5f4de4bc6925632121e9f3c93eeabecd18bc7eeb.