[tz] minor cleaning in Makefile

[Paul Eggert]

On 05/14/13 11:37, Denis Excoffier wrote:

> Now that NOID is gone, there is no point to keep it in Makefile (patch attached).

Thanks, pushed into the experimental github version as
commit 13d50f6f74a17cc68b99968ea3046ea12cd9c47d.