Revert "Add Omni ramdisk and use it by default"

This reverts commit 84bb7751b2fc9dc7176e77af03c70dae45992c2b.

Conflicts:
	make_tuna_aosp.sh
Revert "Add my kernel building stuff"

This reverts commit 234d4ebb6b2d98e26313a5725579121d13d2021c.

Conflicts:
	make_tuna_aosp.sh