QuRT: removed calls to sleep

A stub for hrt_sleep was removed. Will add back when DSPAL supports
sleep.

Signed-off-by: Mark Charlebois <charlebm@gmail.com>

src/platforms/qurt/px4_layer/drv_hrt.c

@@ -285,14 +285,6 @@ void	hrt_call_at(struct hrt_call *entry, hrt_abstime calltime, hrt_callout callo
 	hrt_call_internal(entry, calltime, 0, callout, arg);
 }
 
-void hrt_sleep(uint32_t seconds)
-{
-}
-
-void hrt_usleep(uint32_t useconds)
-{
-}
-
 #if 0
 /*
  * Convert absolute time to a timespec.

src/platforms/qurt/px4_layer/px4_qurt_tasks.cpp

@@ -195,3 +195,8 @@ void px4_show_tasks()
 
 // STUBS
 
+extern "C" {
+void hrt_sleep(unsigned long)
+{
+}
+}

src/platforms/qurt/tests/hello/hello_example.cpp

@@ -40,15 +40,9 @@
  */
 
 #include "hello_example.h"
-#include <drivers/drv_hrt.h>
 #include <unistd.h>
 #include <stdio.h>
 
-/*
- * Wrap the sleep call.
- */
-__EXPORT extern void   hrt_sleep(uint32_t seconds);
-
 px4::AppState HelloExample::appState;
 
 int HelloExample::main()
@@ -57,7 +51,6 @@ int HelloExample::main()
 
 	int i=0;
 	while (!appState.exitRequested() && i<5) {
-		hrt_sleep(2);
 
 		printf("  Doing work...\n");
 		++i;