make px4::ok work, use it in px4::spin

src/platforms/nuttx/module.mk

@@ -35,9 +35,6 @@
 # NuttX / uORB adapter library
 #
 
-SRCS		 = 	px4_nuttx_impl.cpp \
-			px4_publisher.cpp \
-			px4_subscriber.cpp \
-			px4_nodehandle.cpp
+SRCS		 = 	px4_nuttx_impl.cpp
 
 MAXOPTIMIZATION	 = -Os

src/platforms/nuttx/px4_nodehandle.cpp

@@ -37,27 +37,8 @@
  * PX4 Middleware Wrapper Nodehandle
  */
 #include <px4.h>
-#include <platforms/px4_nodehandle.h>
 
 namespace px4
 {
-bool task_should_exit = false;
-
-
-void NodeHandle::spinOnce() {
-	/* Loop through subscriptions, call callback for updated subscriptions */
-	uORB::SubscriptionNode *sub = _subs.getHead();
-	int count = 0;
-
-	while (sub != nullptr) {
-		if (count++ > kMaxSubscriptions) {
-			PX4_WARN("exceeded max subscriptions");
-			break;
-		}
-
-		sub->update();
-		sub = sub->getSibling();
-	}
-}
 
 }

src/platforms/nuttx/px4_nuttx_impl.cpp

@@ -54,9 +54,4 @@ uint64_t get_time_micros()
 	return hrt_absolute_time();
 }
 
-bool ok()
-{
-	return !task_should_exit;
-}
-
 }