Copter: remove TUNE param descr for AHRS Yaw/RP kP

ArduCopter/Parameters.pde

@@ -328,7 +328,7 @@ const AP_Param::Info var_info[] PROGMEM = {
     // @DisplayName: Channel 6 Tuning
     // @Description: Controls which parameters (normally PID gains) are being tuned with transmitter's channel 6 knob
     // @User: Standard
-    // @Values: 0:None,1:Stab Roll/Pitch kP,4:Rate Roll/Pitch kP,5:Rate Roll/Pitch kI,21:Rate Roll/Pitch kD,3:Stab Yaw kP,6:Rate Yaw kP,26:Rate Yaw kD,14:Altitude Hold kP,7:Throttle Rate kP,34:Throttle Accel kP,35:Throttle Accel kI,36:Throttle Accel kD,42:Loiter Speed,12:Loiter Pos kP,22:Velocity XY kP,28:Velocity XY kI,10:WP Speed,25:Acro RollPitch kP,40:Acro Yaw kP,13:Heli Ext Gyro,17:OF Loiter kP,18:OF Loiter kI,19:OF Loiter kD,30:AHRS Yaw kP,31:AHRS kP,38:Declination,39:Circle Rate,41:RangeFinder Gain,46:Rate Pitch kP,47:Rate Pitch kI,48:Rate Pitch kD,49:Rate Roll kP,50:Rate Roll kI,51:Rate Roll kD,52:Rate Pitch FF,53:Rate Roll FF,54:Rate Yaw FF
+    // @Values: 0:None,1:Stab Roll/Pitch kP,4:Rate Roll/Pitch kP,5:Rate Roll/Pitch kI,21:Rate Roll/Pitch kD,3:Stab Yaw kP,6:Rate Yaw kP,26:Rate Yaw kD,14:Altitude Hold kP,7:Throttle Rate kP,34:Throttle Accel kP,35:Throttle Accel kI,36:Throttle Accel kD,42:Loiter Speed,12:Loiter Pos kP,22:Velocity XY kP,28:Velocity XY kI,10:WP Speed,25:Acro RollPitch kP,40:Acro Yaw kP,13:Heli Ext Gyro,17:OF Loiter kP,18:OF Loiter kI,19:OF Loiter kD,38:Declination,39:Circle Rate,41:RangeFinder Gain,46:Rate Pitch kP,47:Rate Pitch kI,48:Rate Pitch kD,49:Rate Roll kP,50:Rate Roll kI,51:Rate Roll kD,52:Rate Pitch FF,53:Rate Roll FF,54:Rate Yaw FF
     GSCALAR(radio_tuning, "TUNE",                   0),
 
     // @Param: TUNE_LOW