[gtk] window: Remove set_icon_from_file

[Matthias Clasen <matthiasc src gnome org>]

commit 7abcd5ba3b0b188f10969f437a80ddb6aa9f2deb
Author: Timm Bäder <mail baedert org>
Date:   Sun Dec 30 06:25:57 2018 +0100

    window: Remove set_icon_from_file
    
    Not all backends support setting window icons from raw pixel data, so
    remove the public API in GtkWindow for it.

 gtk/gtkwindow.c | 32 --------------------------------
 gtk/gtkwindow.h |  4 ----
 2 files changed, 36 deletions(-)
---
diff --git a/gtk/gtkwindow.c b/gtk/gtkwindow.c
index 44b83e678a..491c4aa291 100644
--- a/gtk/gtkwindow.c
+++ b/gtk/gtkwindow.c
@@ -4977,38 +4977,6 @@ load_texture_verbosely (const char *filename,
   return texture;
 }
 
-/**
- * gtk_window_set_icon_from_file:
- * @window: a #GtkWindow
- * @filename: (type filename): location of icon file
- * @err: (allow-none): location to store error, or %NULL.
- *
- * Sets the icon for @window.
- * Warns on failure if @err is %NULL.
- *
- * This function is equivalent to calling gtk_window_set_icon()
- * with a surface created by loading the image from @filename.
- *
- * Returns: %TRUE if setting the icon succeeded.
- **/
-gboolean
-gtk_window_set_icon_from_file (GtkWindow   *window,
-                              const gchar *filename,
-                              GError     **err)
-{
-  GdkTexture *texture = load_texture_verbosely (filename, err);
-
-  if (texture)
-    {
-      gtk_window_set_icon (window, texture);
-      g_object_unref (texture);
-      
-      return TRUE;
-    }
-  else
-    return FALSE;
-}
-
 /**
  * gtk_window_set_default_icon_list:
  * @list: (element-type GdkTexture) (transfer container): a list of #GdkTextures
diff --git a/gtk/gtkwindow.h b/gtk/gtkwindow.h
index 35143ab700..889ca89656 100644
--- a/gtk/gtkwindow.h
+++ b/gtk/gtkwindow.h
@@ -284,10 +284,6 @@ GDK_AVAILABLE_IN_ALL
 void       gtk_window_set_icon_name                (GtkWindow   *window,
                                                    const gchar *name);
 GDK_AVAILABLE_IN_ALL
-gboolean   gtk_window_set_icon_from_file           (GtkWindow   *window,
-                                                   const gchar *filename,
-                                                   GError     **err);
-GDK_AVAILABLE_IN_ALL
 GdkTexture *  gtk_window_get_icon                  (GtkWindow  *window);
 GDK_AVAILABLE_IN_ALL
 const gchar * gtk_window_get_icon_name             (GtkWindow  *window);