remove support for Sun windows (was Re: isearch multiple buffers)

[Dan Nicolaescu]

Richard Stallman <address@hidden> writes:

  >     There are also a couple of HAVE_X11R5 and HAVE_X11R6.  I think we can 
get rid 
  >     of all three.  The first R6 was released in 1994.
  > 
  > Let's get rid of HAVE_X11R5, but before we get rid of HAVE_X11R6,
  > let's ask if anyone still uses a system with X11r5.  Those conditionals
  > are few, so we won't gain much by deleting them.

How about removing support for Sun windows (sunfns.c + a few lisp
files)?