hallon: Remove obsolete ALS configuration

Fix keyboard recovery indication
Also set button_backlight current on pre_hw_config.sh to avoid too bright recovery indication.

Signed-off-by: Michael Bestas <mikeioannina@gmail.com>

Change-Id: I60d879807c5e091de7b15ffa4dc63cdf3e983ed2
Merge "hallon: Remove obsolete ALS configuration" into jellybean