Revert "API: Add API to set style properties to be inherit"

Inheritance is now done using style property flags, so thereis no ned
anymore to clobber the pspec flags namespace.
Also, there is no need to expose this functionality in the public API
without exposing more of the styleproperty API.

This essentially reverts commit 9bfd3d2eec.

gtk/gtkstyleproperties.c

@@ -361,54 +361,6 @@ gtk_style_properties_lookup_property (const gchar             *property_name,
   return found;
 }
 
-/* GParamSpec functionality */
-
-enum {
-  GTK_STYLE_PARAM_INHERIT = 1 << G_PARAM_USER_SHIFT
-};
-
-/**
- * gtk_style_param_set_inherit:
- * @pspec: A style param
- * @inherit: whether the @pspec value should be inherited
- *
- * Sets whether a param spec installed with function such as
- * gtk_style_properties_register_property() or
- * gtk_widget_class_install_style_property() should inherit their
- * value from the parent widget if it is not set instead of using
- * the default value of @pspec. See the
- * <ulink url="http://www.w3.org/TR/CSS21/cascade.html#inheritance">
- * CSS specification's description of inheritance</ulink> for a
- * longer description of this concept.
- *
- * By default, param specs do not inherit their value.
- **/
-void
-gtk_style_param_set_inherit (GParamSpec *pspec,
-                             gboolean    inherit)
-{
-  if (inherit)
-    pspec->flags |= GTK_STYLE_PARAM_INHERIT;
-  else
-    pspec->flags &= ~GTK_STYLE_PARAM_INHERIT;
-}
-
-/**
- * gtk_style_param_get_inherit:
- * @pspec: a style param
- *
- * Checks if the value of this param should be inherited from the parent
- * #GtkWidget instead of using the default value when it has not been
- * specified. See gtk_style_param_set_inherit() for more details.
- *
- * Returns: %TRUE if the param should inherit its value
- **/
-gboolean
-gtk_style_param_get_inherit (GParamSpec *pspec)
-{
-  return (pspec->flags & GTK_STYLE_PARAM_INHERIT) ? TRUE : FALSE;
-}
-
 /* GtkStyleProperties methods */
 
 /**