AC_AttitudeControl: remove PosControl_Sub

libraries/AC_AttitudeControl/AC_PosControl_Sub.cpp

@@ -1,2 +0,0 @@
-#include "AC_PosControl_Sub.h"
-

libraries/AC_AttitudeControl/AC_PosControl_Sub.h

@@ -1,24 +0,0 @@
-#pragma once
-
-#include "AC_PosControl.h"
-
-#define POSCONTROL_JERK_RATIO                   1.0f    // Defines the time it takes to reach the requested acceleration
-
-class AC_PosControl_Sub : public AC_PosControl {
-public:
-    using AC_PosControl::AC_PosControl;
-
-    /// set_alt_max - sets maximum altitude above the ekf origin in cm
-    ///   only enforced when set_pos_target_z_from_climb_rate_cm is used
-    ///   set to zero to disable limit
-    void set_alt_max(float alt) { _alt_max = alt; }
-
-    /// set_alt_min - sets the minimum altitude (maximum depth) in cm
-    ///   only enforced when set_pos_target_z_from_climb_rate_cm is used
-    ///   set to zero to disable limit
-    void set_alt_min(float alt) { _alt_min = alt; }
-
-private:
-    float       _alt_max; // max altitude - should be updated from the main code with altitude limit from fence
-    float       _alt_min; // min altitude - should be updated from the main code with altitude limit from fence
-};