mcs,sporadic: Remove calls to refill_unblock_check

refill_unblock_check is called in switchSchedContext whenever an SC is
switched to. Any other calls would have no effect:
- If the SC was already running then it would have had
  refill_unblock_check already called on it,
- If the SC was not already running, then it would have
  refill_unblock_check called when it was next switched to which would
  override the previous call.

Signed-off-by: Kent McLeod <kent@kry10.com>

src/object/notification.c

@@ -45,14 +45,6 @@ static inline void maybeDonateSchedContext(tcb_t *tcb, notification_t *ntfnPtr)
         sched_context_t *sc = SC_PTR(notification_ptr_get_ntfnSchedContext(ntfnPtr));
         if (sc != NULL && sc->scTcb == NULL) {
             schedContext_donate(sc, tcb);
-            if (sc != NODE_STATE(ksCurSC)) {
-                /* refill_unblock_check should not be called on the
-                 * current SC as it is already running. The current SC
-                 * may have been bound to a notificaiton object if the
-                 * current thread was deleted in a long-running deletion
-                 * that became preempted. */
-                refill_unblock_check(sc);
-            }
             schedContext_resume(sc);
         }
     }

src/object/schedcontext.c

@@ -181,7 +181,6 @@ static exception_t invokeSchedContext_YieldTo(sched_context_t *sc, word_t *buffe
 
     bool_t return_now = true;
     if (isSchedulable(sc->scTcb)) {
-        refill_unblock_check(sc);
         if (SMP_COND_STATEMENT(sc->scCore != getCurrentCPUIndex() ||)
             sc->scTcb->tcbPriority < NODE_STATE(ksCurThread)->tcbPriority) {
             tcbSchedDequeue(sc->scTcb);