pybricks/util_pb: Drop s and v adjustment hacks.

The newly introduced color cost function intrinsically deals with low s and v, so we don't need to artificially suppress them here.

pybricks/util_pb/pb_color_map.c

@@ -32,16 +32,6 @@ void pb_color_map_rgb_to_hsv(const pbio_color_rgb_t *rgb, pbio_color_hsv_t *hsv)
     // Standard conversion
     pbio_color_rgb_to_hsv(rgb, hsv);
 
-    // For very low values, saturation is not reliable
-    if (hsv->v <= 3) {
-        hsv->s = 0;
-    }
-
-    // For very low values, hue is not reliable
-    if (hsv->s <= 3) {
-        hsv->h = 0;
-    }
-
     // Slight shift for lower hues to make yellow somewhat more accurate
     if (hsv->h < 40) {
         uint8_t offset = ((hsv->h - 20) << 8) / 20;