diff --git a/libraries/AP_HAL_QURT/Scheduler.h b/libraries/AP_HAL_QURT/Scheduler.h
index 1c5389fe37..82ea781a64 100644
--- a/libraries/AP_HAL_QURT/Scheduler.h
+++ b/libraries/AP_HAL_QURT/Scheduler.h
@@ -13,11 +13,6 @@
 #define APM_TIMER_PRIORITY      181
 #define APM_UART_PRIORITY        60
 #define APM_IO_PRIORITY          58
-#define APM_SHELL_PRIORITY       57
-#define APM_OVERTIME_PRIORITY    10
-#define APM_STARTUP_PRIORITY     10
-
-#define APM_MAIN_THREAD_STACK_SIZE 16384
 
 /* Scheduler implementation: */
 class QURT::Scheduler : public AP_HAL::Scheduler {
diff --git a/libraries/AP_HAL_QURT/Semaphores.h b/libraries/AP_HAL_QURT/Semaphores.h
index ba7029d588..89ec68346f 100644
--- a/libraries/AP_HAL_QURT/Semaphores.h
+++ b/libraries/AP_HAL_QURT/Semaphores.h
@@ -9,9 +9,7 @@
 class QURT::Semaphore : public AP_HAL::Semaphore {
 public:
     Semaphore() {
-        HAP_PRINTF("%s constructor", __FUNCTION__);
         pthread_mutex_init(&_lock, NULL);
-        HAP_PRINTF("%s constructor2", __FUNCTION__);
     }
     bool give();
     bool take(uint32_t timeout_ms);
diff --git a/libraries/AP_HAL_QURT/Util.h b/libraries/AP_HAL_QURT/Util.h
index 8927f6b88e..bdf2d054f1 100644
--- a/libraries/AP_HAL_QURT/Util.h
+++ b/libraries/AP_HAL_QURT/Util.h
@@ -20,9 +20,7 @@
 
 class QURT::Util : public AP_HAL::Util {
 public:
-    Util(void) {
-        HAP_PRINTF("%s constructor", __FUNCTION__);
-    }
+    Util(void) {}
     bool run_debug_shell(AP_HAL::BetterStream *stream) override { return false; }
 
     uint32_t available_memory(void) override;