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>
diff --git a/Documentation/scheduler/sched-hmp.txt b/Documentation/scheduler/sched-hmp.txt
index 09b7dc1..f485dc8 100644
--- a/Documentation/scheduler/sched-hmp.txt
+++ b/Documentation/scheduler/sched-hmp.txt
@@ -910,7 +910,7 @@
 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