Remove unused symbols related to ivtype_map.

Remove unused symbols related to ivtype_map.

Remove unused symbols related to ivtype_map.  This map does not appear to
exist and I see no evidence of its removal in the ChangeLog.

Tested on x86_64.

Index: gcc/ChangeLog

2013-04-02  Lawrence Crowl  <crowl@google.com>

	* sese.h (struct ivtype_map_elt_s): Remove unused.
	(extern debug_ivtype_map): Remove unused.
	(extern eq_ivtype_map_elts): Remove unused.
	* sese.c (debug_ivtype_map): Removed unused.
	(debug_ivtype_map_1): Removed unused.
	(debug_ivtype_elt): Remove unused.
	(eq_ivtype_map_elts): Remove unused.

From-SVN: r197374