[gimp] app: remove the legacy threshold lut code

[Michael Natterer <mitch src gnome org>]

commit d0d50ca1ea2812f5c023735dff8ed33685e06010
Author: Michael Natterer <mitch gimp org>
Date:   Thu Mar 15 11:24:33 2012 +0100

    app: remove the legacy threshold lut code

 app/base/lut-funcs.c |   40 ----------------------------------------
 app/base/lut-funcs.h |    3 ---
 2 files changed, 0 insertions(+), 43 deletions(-)
---
diff --git a/app/base/lut-funcs.c b/app/base/lut-funcs.c
index f1b01cf..f7a2248 100644
--- a/app/base/lut-funcs.c
+++ b/app/base/lut-funcs.c
@@ -89,46 +89,6 @@ brightness_contrast_lut_new (gdouble brightness,
   return lut;
 }
 
-/* ---------------- Threshold ------------------ */
-
-static gfloat
-threshold_lut_func (gdouble *min,
-                    gint     n_channels,
-                    gint     channel,
-                    gfloat   value)
-{
-  /* don't change the alpha channel */
-  if ((n_channels == 2 || n_channels == 4) && channel == n_channels -1)
-    return value;
-
-  if (value < *min)
-    return 0.0;
-
-  return 1.0;
-}
-
-static void
-threshold_lut_setup (GimpLut *lut,
-                     gdouble  value,
-                     gint     n_channels)
-{
-  g_return_if_fail (lut != NULL);
-
-  gimp_lut_setup_exact (lut,
-                        (GimpLutFunc) threshold_lut_func, &value, n_channels);
-}
-
-GimpLut *
-threshold_lut_new (gdouble value,
-                   gint    n_channels)
-{
-  GimpLut *lut = gimp_lut_new ();
-
-  threshold_lut_setup (lut, value, n_channels);
-
-  return lut;
-}
-
 /* --------------- equalize ------------- */
 
 typedef struct
diff --git a/app/base/lut-funcs.h b/app/base/lut-funcs.h
index f9c2ffb..f3bd53d 100644
--- a/app/base/lut-funcs.h
+++ b/app/base/lut-funcs.h
@@ -27,9 +27,6 @@ void      brightness_contrast_lut_setup (GimpLut       *lut,
                                          gdouble        contrast,
                                          gint           n_channels);
 
-GimpLut * threshold_lut_new             (gdouble        value,
-                                         gint           n_channels);
-
 GimpLut * equalize_lut_new              (GimpHistogram *histogram,
                                          gint           n_channels);