libipa: lux: Normalize referenceY to 1

By normalizing the referenceY value to 1 (which is the usual range for
Y) in the tuning file, the bins_ value is no longer needed. Remove it.

Signed-off-by: Stefan Klug <stefan.klug@ideasonboard.com>
Reviewed-by: Paul Elder <paul.elder@ideasonboard.com>
Reviewed-by: Daniel Scally <dan.scally@ideasonboard.com>
Reviewed-by: Daniel Scally <dan.scally@ideasonboard.com>

src/ipa/rkisp1/algorithms/lux.cpp

@@ -33,12 +33,8 @@ namespace ipa::rkisp1::algorithms {
 
 /**
  * \brief Construct an rkisp1 Lux algo module
- *
- * The Lux helper is initialized to 65535 as that is the max bin count on the
- * rkisp1.
  */
 Lux::Lux()
-	: lux_(65535)
 {
 }