ACPI: delete CONFIG_ACPI_PROCFS_SLEEP (again)

CONFIG_ACPI_PROCFS_SLEEP is a NO-OP -- delete it (again).

Apparently 296699de

 creating CONFIG_SUSPEND
and CONFIG_PM_SLEEP was based on an out-dated version of drivers/acpi/Kconfig,
as it erroneously restored this recently deleted config option.

Signed-off-by: Len Brown <len.brown@intel.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>