FlightTaskAutoLine: remove activate method bc uses same impl as FlightTaskAutoMapper

src/lib/FlightTasks/tasks/FlightTaskAutoLine.cpp

@@ -43,12 +43,6 @@ using namespace matrix;
 #define SIGMA_SINGLE_OP			0.000001f
 #define SIGMA_NORM			0.001f
 
-bool FlightTaskAutoLine::activate()
-{
-	return FlightTaskAutoMapper::activate();
-}
-
-
 void FlightTaskAutoLine::_generateSetpoints()
 {
 	_generateAltitudeSetpoints();
@@ -61,8 +55,6 @@ void FlightTaskAutoLine::_generateSetpoints()
 	}
 }
 
-
-
 void FlightTaskAutoLine::_generateXYsetpoints()
 {
 	Vector2f pos_sp_to_dest = Vector2f(&(_target - _position_setpoint)(0));

src/lib/FlightTasks/tasks/FlightTaskAutoLine.hpp

@@ -47,7 +47,6 @@ class FlightTaskAutoLine : public FlightTaskAutoMapper
 public:
 	FlightTaskAutoLine() = default;
 	virtual ~FlightTaskAutoLine() = default;
-	bool activate() override;
 
 protected: