examples: fixed build of some examples with new AP_Declination code

Tools/VARTest/VARTest.pde

@@ -28,10 +28,7 @@
 #include <GCS_MAVLink.h>
 #include <config.h>
 #include <Parameters.h>
-
-#if 0
 #include <AP_Declination.h>
-#endif
 
 static Parameters g;
 

libraries/AP_Math/examples/eulers/eulers.pde

@@ -28,9 +28,8 @@ AP_Baro_BMP085_HIL      barometer;
 AP_Compass_HIL     compass;
 #endif
 
-#if 0
 #include <AP_Declination.h>
-#endif
+
 
 static float rad_diff(float rad1, float rad2)
 {

libraries/AP_Math/examples/rotations/rotations.pde

@@ -25,10 +25,7 @@ AP_Baro_BMP085_HIL      barometer;
 AP_Compass_HIL     compass;
 #endif
 
-#if AUTOMATIC_DECLINATION == ENABLED
-// this is in an #if to avoid the static data
 #include <AP_Declination.h> // ArduPilot Mega Declination Helper Library
-#endif
 
 
 // standard rotation matrices (these are the originals from the old code)