refactor(commander): remove needless parameter COM_KILL_DISARM (#26736)

src/modules/commander/Commander.cpp

@@ -766,6 +766,7 @@ Commander::Commander() :
 	updateParameters();
 
 	_failsafe.setOnNotifyUserCallback(&Commander::onFailsafeNotifyUserTrampoline, this);
+	_auto_disarm_killed.set_hysteresis_time_from(false, 5_s);
 }
 
 Commander::~Commander()
@@ -1814,8 +1815,6 @@ void Commander::updateParameters()
 		_vehicle_status.system_type = value_int32;
 	}
 
-	_auto_disarm_killed.set_hysteresis_time_from(false, _param_com_kill_disarm.get() * 1_s);
-
 	const bool is_rotary = is_rotary_wing(_vehicle_status) || (is_vtol(_vehicle_status)
 			       && _vtol_vehicle_status.vehicle_vtol_state != vtol_vehicle_status_s::VEHICLE_VTOL_STATE_FW);
 	const bool is_fixed = is_fixed_wing(_vehicle_status) || (is_vtol(_vehicle_status)

src/modules/commander/Commander.hpp

@@ -343,7 +343,6 @@ private:
 		(ParamBool<px4::params::COM_HOME_EN>)       _param_com_home_en,
 		(ParamBool<px4::params::COM_HOME_IN_AIR>)   _param_com_home_in_air,
 		(ParamBool<px4::params::COM_FORCE_SAFETY>)  _param_com_force_safety,
-		(ParamFloat<px4::params::COM_KILL_DISARM>)  _param_com_kill_disarm,
 		(ParamBool<px4::params::COM_MOT_TEST_EN>)   _param_com_mot_test_en,
 		(ParamFloat<px4::params::COM_OBC_LOSS_T>)   _param_com_obc_loss_t,
 		(ParamInt<px4::params::COM_PREARM_MODE>)    _param_com_prearm_mode,

src/modules/commander/commander_params.c

@@ -710,19 +710,6 @@ PARAM_DEFINE_INT32(COM_FORCE_SAFETY, 0);
  */
 PARAM_DEFINE_INT32(COM_MOT_TEST_EN, 1);
 
-/**
- * Timeout value for disarming when kill switch is engaged
- *
- * Use RC_MAP_KILL_SW to map a kill switch.
- *
- * @group Commander
- * @unit s
- * @min 0.0
- * @max 30.0
- * @increment 0.1
- */
-PARAM_DEFINE_FLOAT(COM_KILL_DISARM, 5.0f);
-
 /**
  * Maximum allowed CPU load to still arm.
  *

src/modules/rc_update/params.c

@@ -1216,7 +1216,7 @@ PARAM_DEFINE_INT32(RC_MAP_OFFB_SW, 0);
  *
  * This channel immediately sets all outputs to their disarmed values, parachutes are NOT deployed.
  * Unlike termination this can be undone. Quickly flipping the switch back restores control.
- * System auto-disarms after COM_KILL_DISARM seconds, preflight checks and re-arming are then required.
+ * System auto-disarms after 5 seconds, preflight checks and re-arming are then required.
  *
  * @min 0
  * @max 18