remove cast to rtx_insn * in remove_note

remove cast to rtx_insn * in remove_note

gcc/ChangeLog:

2016-11-01  Trevor Saunders  <tbsaunde+gcc@tbsaunde.org>

	* config/rl78/rl78.c (gen-and_emit_move): Change argument type
	to rtx_insn *.
	(transcode_memory_rtx): Likewise.
	(move_to_acc): Likewise.
	(move_from_acc): Likewise.
	(move_acc_to_reg): Likewise.
	(move_to_x): Likewise.
	(move_to_hl): Likewise.
	(move_to_de): Likewise.
	* config/rs6000/rs6000.c (emit_frame_save): Likewise.
	(rs6000_emit_savres_rtx): Likewise.
	(rs6000_emit_prologue): Likewise.
	* reorg.c (update_reg_unused_notes): Likewise.
	* rtl.h (remove_note): Adjust prototype.
	* rtlanal.c (remove_note): Make argument type rtx_insn *.

From-SVN: r241771