Cleanup: remove unused - breakpoint, buildsym

	Cleanup: remove unused - breakpoint, buildsym

	* breakpoint.c (parse_cond_to_aexpr): Remove unused 'old_chain'.
	(print_it_watchpoint): Remove unused 'bl'.
	(say_where): Remove unused 'uiout'.
	(bpstat_remove_breakpoint_callback): Remove unused 'uiout'.
	(bkpt_breakpoint_hit): Remove unused 'b'.
	(internal_bkpt_print_it): Remove unused 'uiout'.
	* buildsym.c (augment_type_symtab): Remove unused 'i'.

	Reference: http://sourceware.org/ml/gdb-patches/2013-03/msg01080.html