* arch-utils.c (default_prepare_to_proceed): Remove.

	* arch-utils.c (default_prepare_to_proceed): Remove.
	(generic_prepare_to_proceed): Remove.
	* arch-utils.h (default_prepare_to_proceed): Remove prototype.
	(generic_prepare_to_proceed): Remove prototype.
	* gdbarch.sh (PREPARE_TO_PROCEED): Remove.
	* gdbarch.c: Regenerate.
	* gdbarch.h: Regenerate.
	* hppa-tdep.c (hppa_prepare_to_proceed): Remove dangling prototype.
	* hppah-nat.c (hppa_switched_threads): Remove.
	* infrun.c (prepare_to_proceed): New static function, copied from
	generic_prepare_to_proceed.  Remove select_it argument.
	(proceed): Call prepare_to_proceed.
	* infttrace.c (old_gdb_pid, reported_pid, reported_bpt): Remove
	variables.
	(ptrace_wait): Don't set the removed variables.
	(hppa_switched_threads): Remove.
	* lin-lwp.c (lin_lwp_prepare_to_proceed): Remove.
	* config/nm-linux.h (PREPARE_TO_PROCEED): Don't define.
	(lin_lwp_prepare_to_proceed): Remove prototype.
	* config/i386/nm-x86-64linux.h (PREPARE_TO_PROCEED): Don't undefine.
	* config/pa/nm-hppah.h (PREPARE_TO_PROCEED): Don't define.