ion: remove ion_user_handle_t from ion_test.h

ion_test.h should not define ion_user_handle_t, and defining it
causes a warning:
In file included from drivers/staging/android/ion/ion_test.c:31:
drivers/staging/android/ion/../uapi/ion_test.h:23: error: redefinition of typedef 'ion_user_handle_t'
drivers/staging/android/ion/../uapi/ion.h:23: note: previous declaration of 'ion_user_handle_t' was here

Reported-by: Andrew Morton <[email protected]>
Cc: John Stultz <[email protected]>
Signed-off-by: Colin Cross <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>

drivers/staging/android/uapi/ion_test.h

@@ -20,8 +20,6 @@
 #include <linux/ioctl.h>
 #include <linux/types.h>
 
-typedef int ion_user_handle_t;
-
 /**
  * struct ion_test_rw_data - metadata passed to the kernel to read handle
  * @ptr:	a pointer to an area at least as large as size