zephyr: Remove long-obsolete machine_ptr_t typedef's.

zephyr/mpconfigport.h

@@ -98,9 +98,6 @@
 
 typedef int mp_int_t; // must be pointer size
 typedef unsigned mp_uint_t; // must be pointer size
-
-typedef void *machine_ptr_t; // must be of pointer size
-typedef const void *machine_const_ptr_t; // must be of pointer size
 typedef long mp_off_t;
 
 #define MP_STATE_PORT MP_STATE_VM

zephyr/mpconfigport_minimal.h

@@ -80,9 +80,6 @@
 
 typedef int mp_int_t; // must be pointer size
 typedef unsigned mp_uint_t; // must be pointer size
-
-typedef void *machine_ptr_t; // must be of pointer size
-typedef const void *machine_const_ptr_t; // must be of pointer size
 typedef long mp_off_t;
 
 #define MP_STATE_PORT MP_STATE_VM