builtin: remove USE_THE_REPOSITORY for those without the_repository

For builtins that do not operate on a repository, remove
the #define USE_THE_REPOSITORY.

Signed-off-by: John Cai <johncai86@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

builtin/get-tar-commit-id.c

@@ -1,7 +1,6 @@
 /*
  * Copyright (c) 2005, 2006 Rene Scharfe
  */
-#define USE_THE_REPOSITORY_VARIABLE
 #include "builtin.h"
 #include "commit.h"
 #include "tar.h"