Posix Port: Comment and remove unused variables (#230)

* Posix Port: Comment and remove unused variables
* Fix header, replace tabs with spaces

portable/ThirdParty/GCC/Posix/port.c

@@ -1,6 +1,6 @@
 /*
  * FreeRTOS Kernel V10.4.2
- * Copyright (C) 2020 Cambridge Consultants Ltd.
+ * Copyright (C) 2020 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
@@ -22,7 +22,6 @@
  * https://www.FreeRTOS.org
  * https://github.com/FreeRTOS
  *
- * 1 tab == 4 spaces!
  */
 
 /*-----------------------------------------------------------
@@ -199,7 +198,10 @@ sigset_t xSignals;
     }
 
     /* Cancel the Idle task and free its resources */
+#if ( INCLUDE_xTaskGetIdleTaskHandle == 1 )
     vPortCancelThread( xTaskGetIdleTaskHandle() );
+#endif
+
 #if ( configUSE_TIMERS == 1 )
     /* Cancel the Timer task and free its resources */
     vPortCancelThread( xTimerGetTimerDaemonTaskHandle() );
@@ -323,7 +325,9 @@ struct timespec t;
 }
 
 static uint64_t prvStartTimeNs;
-static uint64_t prvTickCount;
+/* commented as part of the code below in vPortSystemTickHandler,
+ * to adjust timing according to full demo requirements */
+/* static uint64_t prvTickCount; */
 
 /*
  * Setup the systick timer to generate the tick interrupts at the required
@@ -364,7 +368,7 @@ static void vPortSystemTickHandler( int sig )
 {
 Thread_t *pxThreadToSuspend;
 Thread_t *pxThreadToResume;
-uint64_t xExpectedTicks;
+/* uint64_t xExpectedTicks; */
 
     uxCriticalNesting++; /* Signals are blocked in this signal handler. */
 
@@ -471,8 +475,6 @@ BaseType_t uxSavedCriticalNesting;
 
 static void prvSuspendSelf( Thread_t *thread )
 {
-int iSig;
-
     /*
      * Suspend this thread by waiting for a pthread_cond_signal event.
      *
@@ -523,7 +525,7 @@ int iRet;
      * will be unblocked.
      */
     (void)pthread_sigmask( SIG_SETMASK, &xAllSignals,
-						   &xSchedulerOriginalSignalMask );
+                           *&xSchedulerOriginalSignalMask );
 
     /* SIG_RESUME is only used with sigwait() so doesn't need a
        handler. */