diff --git a/sw/airborne/sim/booz_imu_hw.c b/sw/airborne/sim/booz_imu_hw.c
deleted file mode 100644
index 9fc943694b..0000000000
--- a/sw/airborne/sim/booz_imu_hw.c
+++ /dev/null
@@ -1,33 +0,0 @@
-/*
- * $Id$
- *  
- * Copyright (C) 2008  Antoine Drouin
- *
- * This file is part of paparazzi.
- *
- * paparazzi is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2, or (at your option)
- * any later version.
- *
- * paparazzi is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with paparazzi; see the file COPYING.  If not, write to
- * the Free Software Foundation, 59 Temple Place - Suite 330,
- * Boston, MA 02111-1307, USA. 
- *
- */
-
-/*
-  hw implementation of booz_imu for sitl simulator
-*/
-
-#include "booz_imu.h"
-
-void booz_imu_hw_init(void) {
-
-}
diff --git a/sw/airborne/sim/booz_imu_hw.h b/sw/airborne/sim/booz_imu_hw.h
deleted file mode 100644
index a40b2b1a69..0000000000
--- a/sw/airborne/sim/booz_imu_hw.h
+++ /dev/null
@@ -1,31 +0,0 @@
-/*
- * $Id$
- *  
- * Copyright (C) 2008  Antoine Drouin
- *
- * This file is part of paparazzi.
- *
- * paparazzi is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2, or (at your option)
- * any later version.
- *
- * paparazzi is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with paparazzi; see the file COPYING.  If not, write to
- * the Free Software Foundation, 59 Temple Place - Suite 330,
- * Boston, MA 02111-1307, USA. 
- *
- */
-
-#ifndef BOOZ_IMU_HW_H
-#define BOOZ_IMU_HW_H
-
-
-
-#endif /* BOOZ_IMU_HW_H */
-
diff --git a/sw/airborne/sim/booz_link_mcu_hw.c b/sw/airborne/sim/booz_link_mcu_hw.c
deleted file mode 100644
index 77fdda4ad6..0000000000
--- a/sw/airborne/sim/booz_link_mcu_hw.c
+++ /dev/null
@@ -1,3 +0,0 @@
-#include "booz_link_mcu.h"
-
-void booz_link_mcu_hw_init ( void ) {}
diff --git a/sw/airborne/sim/booz_link_mcu_hw.h b/sw/airborne/sim/booz_link_mcu_hw.h
deleted file mode 100644
index 66017213aa..0000000000
--- a/sw/airborne/sim/booz_link_mcu_hw.h
+++ /dev/null
@@ -1,26 +0,0 @@
-#ifndef BOOZ_LINK_MCU_HW_H
-#define BOOZ_LINK_MCU_HW_H
-
-#if 0
-/* FIXME: not sure what that does here !!!! */
-#define Spi0InitBuf() {}
-
-#define BoozLinkMcuSetUnavailable() { }
-#define BoozLinkMcuSetAvailable()   { spi_message_received = TRUE; }
-#endif
-
-
-#ifdef  BOOZ_FILTER_MCU
-
-#define BoozLinkMcuHwSend() {}
-
-#endif
-
-
-#ifdef  BOOZ_CONTROLLER_MCU
-
-#define BoozLinkMcuHwRestart() {}
-
-#endif
-
-#endif /* BOOZ_LINK_MCU_HW_H */