score: Remove _Stack_Ensure_minimum() call

This call is superfluous since _Thread_Initialize() will do this also.

Update #3835.

cpukit/score/src/threadcreateidle.c

@@ -21,7 +21,6 @@
 #include <rtems/score/threadimpl.h>
 #include <rtems/score/assert.h>
 #include <rtems/score/schedulerimpl.h>
-#include <rtems/score/stackimpl.h>
 #include <rtems/score/sysstate.h>
 #include <rtems/score/userextimpl.h>
 #include <rtems/config.h>
@@ -55,7 +54,7 @@ static void _Thread_Create_idle_for_CPU( Per_CPU_Control *cpu )
     idle,
     scheduler,
     NULL,        /* allocate the stack */
-    _Stack_Ensure_minimum( rtems_configuration_get_idle_task_stack_size() ),
+    rtems_configuration_get_idle_task_stack_size(),
     CPU_IDLE_TASK_IS_FP,
     _Scheduler_Map_priority( scheduler, scheduler->maximum_priority ),
     true,        /* preemptable */