ArduCopter: Remove unused fence floor enable function

ArduCopter/mode.h

@@ -115,8 +115,6 @@ protected:
     // return expected input throttle setting to hover:
     virtual float throttle_hover() const;
 
-    void autoenable_floor_fence(void);
-
     // Alt_Hold based flight mode states used in Alt_Hold, Loiter, and Sport
     enum AltHoldModeState {
         AltHold_MotorStopped,

ArduCopter/takeoff.cpp

@@ -225,19 +225,3 @@ bool Mode::is_taking_off() const
     }
     return takeoff.running();
 }
-
-//  called when takeoff is complete
-void Mode::autoenable_floor_fence(void)
-{
-#if AC_FENCE == ENABLED
-    switch(copter.fence.auto_enabled()) {
-        case AC_Fence::AutoEnable::ALWAYS_ENABLED:
-        case AC_Fence::AutoEnable::ENABLE_DISABLE_FLOOR_ONLY:
-            copter.fence.enable(true);
-            break;
-        default:
-            // fence does not auto-enable in other takeoff conditions
-            break;
-    }
-#endif
-}