[gtk+] Drop the gtk-key-bindings property

[Matthias Clasen <matthiasc src gnome org>]

commit 793513993bc9ae24d6b86c65c2f83c4f2b6ad9b1
Author: Matthias Clasen <mclasen redhat com>
Date:   Sun Sep 17 16:51:52 2017 -0400

    Drop the gtk-key-bindings property
    
    This has been deprecated for a while. Just use the -gtk-prefixed
    name.

 gtk/gtkcssstylepropertyimpl.c |    1 -
 1 files changed, 0 insertions(+), 1 deletions(-)
---
diff --git a/gtk/gtkcssstylepropertyimpl.c b/gtk/gtkcssstylepropertyimpl.c
index fc4156d..d50b2d3 100644
--- a/gtk/gtkcssstylepropertyimpl.c
+++ b/gtk/gtkcssstylepropertyimpl.c
@@ -1602,7 +1602,6 @@ _gtk_css_style_property_init_properties (void)
                                           bindings_value_parse,
                                           bindings_value_query,
                                           _gtk_css_array_value_new (_gtk_css_string_value_new (NULL)));
-  _gtk_style_property_add_alias ("-gtk-key-bindings", "gtk-key-bindings");
 
   gtk_css_style_property_register        ("caret-color",
                                           GTK_CSS_PROPERTY_CARET_COLOR,