unneeded dependencies for grail

This is probably not very important since grail is not a very
usable browser anyway, but the README.html file mentions two
dependencies:

<a href="../../lang/python21/README.html">python21-2.1.2</A>
<a href="../../x11/py-Tk/README.html">py21-Tk-0</A>

That are not really needed.

Dan