AP_GPS: remove dead GPS_MINDGPS variable

Tools/Frame_params/Sub/bluerov2-3_5.params

@@ -229,7 +229,6 @@ GPS_DELAY_MS2,0
 GPS_GNSS_MODE,0
 GPS_GNSS_MODE2,0
 GPS_INJECT_TO,127
-GPS_MIN_DGPS,100
 GPS_MIN_ELEV,-100
 GPS_NAVFILTER,8
 GPS_POS1_X,0.000000000000000000

Tools/Frame_params/Sub/bluerov2-3_5_2.params

@@ -227,7 +227,6 @@ GPS_DELAY_MS2,0
 GPS_GNSS_MODE,0
 GPS_GNSS_MODE2,0
 GPS_INJECT_TO,127
-GPS_MIN_DGPS,100
 GPS_MIN_ELEV,-100
 GPS_NAVFILTER,8
 GPS_POS1_X,0.0

Tools/Frame_params/Sub/bluerov2-3_5_4.params

@@ -223,7 +223,6 @@ GPS_DELAY_MS2,0
 GPS_GNSS_MODE,0
 GPS_GNSS_MODE2,0
 GPS_INJECT_TO,127
-GPS_MIN_DGPS,100
 GPS_MIN_ELEV,-100
 GPS_NAVFILTER,8
 GPS_POS1_X,0.0

Tools/Frame_params/Sub/bluerov2-4_0_0.params

@@ -263,7 +263,6 @@ GPS_DELAY_MS2,0
 GPS_GNSS_MODE,0
 GPS_GNSS_MODE2,0
 GPS_INJECT_TO,127
-GPS_MIN_DGPS,100
 GPS_MIN_ELEV,-100
 GPS_NAVFILTER,8
 GPS_POS1_X,0.0
@@ -829,3 +828,4 @@ WPNAV_SPEED_DN,150.0
 WPNAV_SPEED_UP,250.0
 WP_YAW_BEHAVIOR,4
 XTRACK_ANG_LIM,45
+

Tools/Frame_params/Sub/bluerov2-heavy-3_5_2.params

@@ -227,7 +227,6 @@ GPS_DELAY_MS2,0
 GPS_GNSS_MODE,0
 GPS_GNSS_MODE2,0
 GPS_INJECT_TO,127
-GPS_MIN_DGPS,100
 GPS_MIN_ELEV,-100
 GPS_NAVFILTER,8
 GPS_POS1_X,0.000000000000000000

Tools/Frame_params/Sub/bluerov2-heavy-3_5_4.params

@@ -223,7 +223,6 @@ GPS_DELAY_MS2,0
 GPS_GNSS_MODE,0
 GPS_GNSS_MODE2,0
 GPS_INJECT_TO,127
-GPS_MIN_DGPS,100
 GPS_MIN_ELEV,-100
 GPS_NAVFILTER,8
 GPS_POS1_X,0.0

Tools/Frame_params/Sub/bluerov2-heavy-4_0_0.params

@@ -263,7 +263,6 @@ GPS_DELAY_MS2,0
 GPS_GNSS_MODE,0
 GPS_GNSS_MODE2,0
 GPS_INJECT_TO,127
-GPS_MIN_DGPS,100
 GPS_MIN_ELEV,-100
 GPS_NAVFILTER,8
 GPS_POS1_X,0.0

Tools/autotest/default_params/vee-gull_005.param

@@ -227,7 +227,6 @@ GPS_DELAY_MS2,0
 GPS_GNSS_MODE,0
 GPS_GNSS_MODE2,0
 GPS_INJECT_TO,127
-GPS_MIN_DGPS,100
 GPS_MIN_ELEV,-100
 GPS_NAVFILTER,8
 GPS_POS1_X,0

libraries/AP_GPS/AP_GPS.cpp

@@ -158,13 +158,7 @@ const AP_Param::GroupInfo AP_GPS::var_info[] = {
     AP_GROUPINFO("_AUTO_SWITCH", 3, AP_GPS, _auto_switch, (int8_t)GPSAutoSwitch::USE_BEST),
 #endif
 
-    // @Param: _MIN_DGPS
+    // 4 was _MIN_GPS, removed Feb 2024
-    // @DisplayName: Minimum Lock Type Accepted for DGPS
-    // @Description: Sets the minimum type of differential GPS corrections required before allowing to switch into DGPS mode.
-    // @Values: 0:Any,50:FloatRTK,100:IntegerRTK
-    // @User: Advanced
-    // @RebootRequired: True
-    AP_GROUPINFO("_MIN_DGPS", 4, AP_GPS, _min_dgps, 100),
 
     // @Param: _SBAS_MODE
     // @DisplayName: SBAS Mode

libraries/AP_GPS/AP_GPS.h

@@ -592,7 +592,6 @@ protected:
     AP_Int8 _type[GPS_MAX_RECEIVERS];
     AP_Int8 _navfilter;
     AP_Int8 _auto_switch;
-    AP_Int8 _min_dgps;
     AP_Int16 _sbp_logmask;
     AP_Int8 _inject_to;
     uint32_t _last_instance_swap_ms;

libraries/SITL/examples/SilentWings/Params/Rolladen-Schneider-LS8b.param

@@ -176,7 +176,6 @@ GPS_DELAY_MS2,0
 GPS_GNSS_MODE,0
 GPS_GNSS_MODE2,0
 GPS_INJECT_TO,127
-GPS_MIN_DGPS,100
 GPS_MIN_ELEV,-100
 GPS_NAVFILTER,8
 GPS_POS1_X,0

libraries/SITL/examples/SilentWings/Params/Schleicher-ASW27B.param

@@ -180,7 +180,6 @@ GPS_DELAY_MS2,0
 GPS_GNSS_MODE,0
 GPS_GNSS_MODE2,0
 GPS_INJECT_TO,127
-GPS_MIN_DGPS,100
 GPS_MIN_ELEV,-100
 GPS_NAVFILTER,8
 GPS_POS1_X,0