unix/modos: Remove duplicate level of #if MICROPY_PY_OS_STATVFS.

unix/modos.c

@@ -70,7 +70,6 @@ STATIC MP_DEFINE_CONST_FUN_OBJ_1(mod_os_stat_obj, mod_os_stat);
 
 #if MICROPY_PY_OS_STATVFS
 
-#if MICROPY_PY_OS_STATVFS
 #if USE_STATFS
 #include <sys/vfs.h>
 #define STRUCT_STATVFS struct statfs
@@ -86,7 +85,6 @@ STATIC MP_DEFINE_CONST_FUN_OBJ_1(mod_os_stat_obj, mod_os_stat);
 #define F_NAMEMAX sb.f_namemax
 #define F_FLAG sb.f_flag
 #endif
-#endif
 
 STATIC mp_obj_t mod_os_statvfs(mp_obj_t path_in) {
     STRUCT_STATVFS sb;