cpuidle: sysfs: Remove the unused define_one_r(o/w) macros

The define_one_ro and define_one_rw macros are not used,
remove it.

Signed-off-by: Hanjun Guo <guohanjun@huawei.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>