Copter: remove unused takeoff_trigger_dz parameter

ArduCopter/Parameters.cpp

@@ -68,14 +68,6 @@ const AP_Param::Info Copter::var_info[] = {
     // @Increment: 10
     GSCALAR(pilot_takeoff_alt,  "PILOT_TKOFF_ALT",  PILOT_TKOFF_ALT_DEFAULT),
 
-    // @Param: PILOT_TKOFF_DZ
-    // @DisplayName: Takeoff trigger deadzone
-    // @Description: Offset from mid stick at which takeoff is triggered
-    // @User: Standard
-    // @Range: 0 500
-    // @Increment: 10
-    GSCALAR(takeoff_trigger_dz, "PILOT_TKOFF_DZ", THR_DZ_DEFAULT),
-
     // @Param: PILOT_THR_BHV
     // @DisplayName: Throttle stick behavior
     // @Description: Bitmask containing various throttle stick options. TX with sprung throttle can set PILOT_THR_BHV to "1" so motor feedback when landed starts from mid-stick instead of bottom of stick.

ArduCopter/Parameters.h

@@ -207,7 +207,7 @@ public:
         k_param_ch10_option_old,
         k_param_ch11_option_old,
         k_param_ch12_option_old,
-        k_param_takeoff_trigger_dz,
+        k_param_takeoff_trigger_dz_old,
         k_param_gcs3,
         k_param_gcs_pid_mask,    // 126
 
@@ -376,7 +376,6 @@ public:
 
     AP_Float        throttle_filt;
     AP_Int16        throttle_behavior;
-    AP_Int16        takeoff_trigger_dz;
     AP_Float        pilot_takeoff_alt;
 
     AP_Int16        rtl_altitude;

ArduCopter/mode.cpp

@@ -381,6 +381,7 @@ bool Copter::Mode::_TakeOff::triggered(const float target_climb_rate) const
         // can't takeoff unless we want to go up...
         return false;
     }
+
     if (copter.motors->get_spool_mode() != AP_Motors::THROTTLE_UNLIMITED) {
         // hold aircraft on the ground until rotor speed runup has finished
         return false;