Revert "BLN: add functions for BLN usually included with S2W. S2W not implemented yet"

This reverts commit 595c4caf49bdba73cd4b65ab3d07ffac72fc321c.
Revert "button light notification (@tbalden)"

This reverts commit 85ea2225370dc8c9170275bb4da8c583c2fde199.