Revert "Update prebuilt su"

This reverts commit 16e7d6c0e28dff529b3952b04b424bbdff620e1a.
Revert "Update Superuser"

This reverts commit c00a3d45bc7a6675660dca67079c715a6f6f4a83.
Revert "Update prebuilt su"

This reverts commit 77e581f5870fb1e341b3cee3debb9e5cf7d4235e.
Revert "Add SuperSU (replacing Superuser, at least for now)"

This reverts commit 32a9469d843f8b5a14d084be0a85a33c11e84291.