refactor(connector): remove unused radio settings frame and update command constant

lib/connector/meshcore_connector.dart

@@ -1093,7 +1093,6 @@ class MeshCoreConnector extends ChangeNotifier {
     await sendFrame(buildDeviceQueryFrame());
     await sendFrame(buildAppStartFrame());
     await requestBatteryStatus(force: true);
-    await sendFrame(buildGetRadioSettingsFrame());
     await sendFrame(buildGetCustomVarsFrame());
     await sendFrame(buildGetAutoAddFlagsFrame());
     _scheduleSelfInfoRetry();

lib/connector/meshcore_protocol.dart

@@ -164,7 +164,7 @@ const int cmdGetChannel = 31;
 const int cmdSetChannel = 32;
 const int cmdSendTracePath = 36;
 const int cmdSetOtherParams = 38;
-const int cmdGetRadioSettings = 57;
+const int cmdSendAnonReq = 57;
 const int cmdGetTelemetryReq = 39;
 const int cmdGetCustomVar = 40;
 const int cmdSetCustomVar = 41;
@@ -691,11 +691,6 @@ Uint8List buildGetContactByKeyFrame(Uint8List pubKey) {
   return writer.toBytes();
 }
 
-// Build CMD_GET_RADIO_SETTINGS frame
-Uint8List buildGetRadioSettingsFrame() {
-  return Uint8List.fromList([cmdGetRadioSettings]);
-}
-
 //Build CMD_GET_CUSTOM_VARS frame
 Uint8List buildGetCustomVarsFrame() {
   return Uint8List.fromList([cmdGetCustomVar]);