Copter: remove stale MAGNETOMETER config option from config files

This isn't used in the code any more

ArduCopter/APM_Config.h

@@ -26,7 +26,6 @@
 //#define WINCH_ENABLED         DISABLED            // disable winch support
 //#define GRIPPER_ENABLED       DISABLED            // disable gripper support
 //#define RPM_ENABLED           DISABLED            // disable rotations per minute sensor support
-//#define MAGNETOMETER          DISABLED            // disable magnetometer support
 //#define STATS_ENABLED         DISABLED            // disable statistics support
 //#define MODE_ACRO_ENABLED     DISABLED            // disable acrobatic mode support
 //#define MODE_AUTO_ENABLED     DISABLED            // disable auto mode support

ArduCopter/config.h

@@ -46,8 +46,6 @@
  #define HIL_MODE        HIL_MODE_DISABLED
 #endif
 
-#define MAGNETOMETER ENABLED
-
 #ifndef ARMING_DELAY_SEC
     # define ARMING_DELAY_SEC 2.0f
 #endif
@@ -191,12 +189,6 @@
  # define EKF_ORIGIN_MAX_DIST_M         50000   // EKF origin and waypoints (including home) must be within 50km
 #endif
 
-//////////////////////////////////////////////////////////////////////////////
-//  MAGNETOMETER
-#ifndef MAGNETOMETER
- # define MAGNETOMETER                   ENABLED
-#endif
-
 #ifndef COMPASS_CAL_STICK_GESTURE_TIME
  #define COMPASS_CAL_STICK_GESTURE_TIME 2.0f // 2 seconds
 #endif