Revert "samsung_battery: Charge level interface"

This reverts commit 3c5b5263076902b2cfa45ec14bb709713dc8f456.
samsung_battery: Charge level interface

- defaults are stock currents
- now separate interfaces for ac and usb

samsung_battery: Charge level interface v2

- added sysfs interface to ignore unstable power
- added sysfs interface to ignore margin

based on implementation of AndreiLux in Perseus kernel

samsung_battery: Add wireless level to charge level interface

samsung-battery: Add charge info to charge level interface V2