py/mpconfig.h: Disable MICROPY_OBJ_IMMEDIATE_OBJS.
The current implementation is still buggy (incomplete), and this is
controversial feature anyway: it makes some thinsg easy, and other more
complicated.
// real objects. Reduces code size by a decent amount without hurting
// performance, for all representations except D on some architectures.
#ifndef MICROPY_OBJ_IMMEDIATE_OBJS
-#define MICROPY_OBJ_IMMEDIATE_OBJS (MICROPY_OBJ_REPR != MICROPY_OBJ_REPR_D)
+#define MICROPY_OBJ_IMMEDIATE_OBJS (0) //(MICROPY_OBJ_REPR != MICROPY_OBJ_REPR_D)
#endif
/*****************************************************************************/
