mimxrt: Remove __WFE() from MICROPY_EVENT_POLL_HOOK.
The device is unreliable with the WFE included.  This needs further
investigation.
@@ -125,7 +125,6 @@ extern const struct _mp_obj_module_t mp_module_utime;
do { \
extern void mp_handle_pending(bool); \
mp_handle_pending(true); \
- __WFE(); \
} while (0);
#define MICROPY_MAKE_POINTER_CALLABLE(p) ((void *)((mp_uint_t)(p) | 1))
