Revert "Gamma Control - added refresh_screen sysfs attribute that has nothing to"

This reverts commit faf5020e5b93675ab61344199a4d85cb5ca8c283.
Revert "LG Mako generic gamma control - add a couple checks before trying to"

This reverts commit 7abb61c8b7186aad040f768e7dc49ba969962003.