Remove unused macros from intervals.h.

* intervals.h (MERGE_INSERTIONS, DISPLAY_INVISIBLE_GLYPH): Remove.
* intervals.c: Adjust comment.

src/ChangeLog

+2012-08-10  Dmitry Antipov  <dmantipov@yandex.ru>
+
+	Remove unused macros from intervals.h.
+	* intervals.h (MERGE_INSERTIONS, DISPLAY_INVISIBLE_GLYPH): Remove.
+	* intervals.c: Adjust comment.
+
 2012-08-10  Eli Zaretskii  <eliz@gnu.org>
 
 	* w32fns.c <w32_unicode_gui>: New static variable.

src/intervals.c

@@ -1559,11 +1559,9 @@ reproduce_tree_obj (INTERVAL source, Lisp_Object parent)
    cases -- either insertion happened in the middle of some interval,
    or between two intervals.
 
-   If the text goes into the middle of an interval, then new
-   intervals are created in the middle with only the properties of
-   the new text, *unless* the macro MERGE_INSERTIONS is true, in
-   which case the new text has the union of its properties and those
-   of the text into which it was inserted.
+   If the text goes into the middle of an interval, then new intervals
+   are created in the middle, and new text has the union of its properties
+   and those of the text into which it was inserted.
 
    If the text goes between two intervals, then if neither interval
    had its appropriate sticky property set (front_sticky, rear_sticky),

src/intervals.h

@@ -213,15 +213,6 @@ interval_copy_parent (INTERVAL d, INTERVAL s)
   if ((from)->rear_sticky) (to)->rear_sticky = 1;     \
 }
 
-/* Macro determining whether the properties of an interval being
-   inserted should be merged with the properties of the text where
-   they are being inserted.  */
-#define MERGE_INSERTIONS(i) 1
-
-/* Macro determining if an invisible interval should be displayed
-   as a special glyph, or not at all.  */
-#define DISPLAY_INVISIBLE_GLYPH(i) 0
-
 /* Is this interval visible?  Replace later with cache access.  */
 #define INTERVAL_VISIBLE_P(i) \
   (i && NILP (textget ((i)->plist, Qinvisible)))