remove useless typedefs

remove useless typedefs

gcc/ChangeLog:

2015-08-11  trevor Saunders  <tbsaunde@tbsaunde.org>

	* bt-load.c, cgraph.h, dwarf2out.c, dwarf2out.h, final.c,
	function.c, graphite-scop-detection.c, haifa-sched.c,
	ipa-devirt.c, ipa-split.c, recog.c, ree.c, stmt.c,
	tree-data-ref.c, tree-ssa-dom.c, tree-ssa-loop-ivopts.c,
	varasm.c: Remove typedefs of structs.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@227000 138bc75d-0d04-0410-961f-82ee72b054a4