Removing pswrap support from gnustep-make

[Nicola Pero]

gnustep-make still supports .psw files, but I wonder if anyone is  
using them.  I'd like to remove
stuff that nobody is using.

Do you know of anyone using pswrap and .psw files ?

I don't even know how to test changes to the pswrap rules since I  
can't find a usable
pswrap for GNU/Linux. :-/

I'll happily keep the code if there is even a single active user, or  
some reasonable probability
that there is an active user somewhere ... otherwise we'll remove it  
and simplify gnustep-make. :-)

Thanks