sched: remove sched_new_task_windows tunable

The sched_new_task_windows tunable is set to 5 in the scheduler
and it is not changed from user space. Remove this unused tunable.

Change-Id: I771e12b44876efe75ce87a90e4e9d69c22168b64
Signed-off-by: Pavankumar Kondeti <pkondeti@codeaurora.org>

Documentation/scheduler/sched-hmp.txt

@@ -910,7 +910,7 @@ returns prev_runnable_sum, scaled to the efficiency and fmax of given
 CPU. The same applies to nt_curr_runnable_sum and  nt_prev_runnable_sum.
 
 A 'new' task is defined as a task whose number of active windows since fork is
-less than sysctl_sched_new_task_windows. An active window is defined as a window
+less than SCHED_NEW_TASK_WINDOWS. An active window is defined as a window
 where a task was observed to be runnable.
 
 *** 6.2 Per-task window-based stats

kernel/sched/hmp.c

@@ -711,7 +711,7 @@ __read_mostly unsigned int sysctl_sched_cpu_high_irqload = (10 * NSEC_PER_MSEC);
 unsigned int __read_mostly sysctl_sched_enable_thread_grouping;
 
 
-__read_mostly unsigned int sysctl_sched_new_task_windows = 5;
+#define SCHED_NEW_TASK_WINDOWS 5
 
 #define SCHED_FREQ_ACCOUNT_WAIT_TIME 0
 
@@ -1842,7 +1842,7 @@ static int account_busy_for_cpu_time(struct rq *rq, struct task_struct *p,
 
 static inline bool is_new_task(struct task_struct *p)
 {
-	return p->ravg.active_windows < sysctl_sched_new_task_windows;
+	return p->ravg.active_windows < SCHED_NEW_TASK_WINDOWS;
 }
 
 #define INC_STEP 8

kernel/sysctl.c

@@ -450,13 +450,6 @@ static struct ctl_table kern_table[] = {
 		.mode           = 0644,
 		.proc_handler   = proc_dointvec,
 	},
-	{
-		.procname       = "sched_new_task_windows",
-		.data           = &sysctl_sched_new_task_windows,
-		.maxlen         = sizeof(unsigned int),
-		.mode           = 0644,
-		.proc_handler   = sched_window_update_handler,
-	},
 	{
 		.procname	= "sched_pred_alert_freq",
 		.data		= &sysctl_sched_pred_alert_freq,