Rover: remove redundant SYS_NUM_RESETS

this is handled by AP_Stats library

APMrover2/Parameters.cpp

@@ -31,13 +31,6 @@ const AP_Param::Info Rover::var_info[] = {
     // @User: Advanced
     GSCALAR(log_bitmask,            "LOG_BITMASK",      DEFAULT_LOG_BITMASK),
 
-    // @Param: SYS_NUM_RESETS
-    // @DisplayName: Num Resets
-    // @Description: Number of APM board resets
-    // @ReadOnly: True
-    // @User: Advanced
-    GSCALAR(num_resets,             "SYS_NUM_RESETS",   0),
-
     // @Param: RST_SWITCH_CH
     // @DisplayName: Reset Switch Channel
     // @Description: RC channel to use to reset to last flight mode after geofence takeover.

APMrover2/Parameters.h

@@ -27,7 +27,7 @@ public:
         // Misc
         //
         k_param_log_bitmask_old = 10,  // unused
-        k_param_num_resets,
+        k_param_num_resets_old,         // unused
         k_param_reset_switch_chan,
         k_param_initial_mode,
         k_param_scheduler,
@@ -212,7 +212,6 @@ public:
     // Misc
     //
     AP_Int32    log_bitmask;
-    AP_Int16    num_resets;
     AP_Int8     reset_switch_chan;
     AP_Int8     initial_mode;
 

APMrover2/system.cpp

@@ -66,10 +66,6 @@ void Rover::init_ardupilot()
 
     rssi.init();
 
-    // keep a record of how many resets have happened. This can be
-    // used to detect in-flight resets
-    g.num_resets.set_and_save(g.num_resets+1);
-
     // init baro before we start the GCS, so that the CLI baro test works
     barometer.init();