diff --git a/sw/airborne/arch/sim/sim_imu.c b/sw/airborne/arch/sim/sim_imu.c
deleted file mode 100644
index 7ec14cf2409..00000000000
--- a/sw/airborne/arch/sim/sim_imu.c
+++ /dev/null
@@ -1,14 +0,0 @@
-/** \file sim_ir.c
- *  \brief Regroup functions to simulate autopilot/infrared.c
- *
- * Infrared soft simulation. OCaml binding.
- */
-
-
-#include <inttypes.h>
-#include "generated/airframe.h"
-
-#include <caml/mlvalues.h>
-
-float ins_roll_neutral  = INS_ROLL_NEUTRAL_DEFAULT;
-float ins_pitch_neutral = INS_PITCH_NEUTRAL_DEFAULT;