Remove Toolbox lockscreen options

Revert "Keyguard: fixup background options"

This reverts commit 172e70a10abb41ec7a4297b31a5a137c9370bdbe.

Revert "Keyguard: Add customizable lockscreen background"

This reverts commit 060230306035aec74690e64a4e4f030e679f1d51.

Revert "Keyguard: Add support for a custom lockscreen message"

This reverts commit ed4c0a52ccc8f71215501eb19de8b0589340fb5e.

Revert "Keyguard: add lockscreen translucent/rotation toggles"

This reverts commit 0cba049e2d3e882d77fb17b83fba5c6753de67ab.