Revert "Fix cpufreq_cooling build."

Fix error below.

kernel/sched/MuQSS.c:3408:6: error: conflicting types for ‘arch_set_thermal_pressure’
 3408 | void arch_set_thermal_pressure(struct cpumask *cpus,
      |      ^~~~~~~~~~~~~~~~~~~~~~~~~
In file included from ./include/linux/energy_model.h:10,
                 from ./include/linux/device.h:16,
                 from ./include/linux/node.h:18,
                 from ./include/linux/cpu.h:17,
                 from ./include/linux/perf_event.h:50,
                 from ./include/linux/trace_events.h:10,
                 from ./include/trace/trace_events.h:21,
                 from ./include/trace/define_trace.h:102,
                 from ./include/trace/events/sched.h:652,
                 from kernel/sched/MuQSS.c:35:
./include/linux/sched/topology.h:247:6: note: previous definition of ‘arch_set_thermal_pressure’ was here
  247 | void arch_set_thermal_pressure(const struct cpumask *cpus,
      |      ^~~~~~~~~~~~~~~~~~~~~~~~~

This reverts commit 89377b9.

kernel/sched/MuQSS.c

@@ -3403,17 +3403,6 @@ static inline u64 do_task_delta_exec(struct task_struct *p, struct rq *rq)
 	return ns;
 }
 
-DEFINE_PER_CPU(unsigned long, thermal_pressure);
-
-void arch_set_thermal_pressure(struct cpumask *cpus,
-			       unsigned long th_pressure)
-{
-	int cpu;
-
-	for_each_cpu(cpu, cpus)
-		WRITE_ONCE(per_cpu(thermal_pressure, cpu), th_pressure);
-}
-
 /*
  * Return accounted runtime for the task.
  * Return separately the current's pending runtime that have not been