Remove stdwin references

Demo/README

@@ -22,10 +22,6 @@ extend		An example of using the generic Makefile.pre.in from
 		the Misc directory to build a statically linked or
 		shared extension module.
 
-ibrowse		An Emacs info file browser (uses stdwin).
-		See also ../doc (the Python library documentation can
-		be converted to info format).
-
 md5test		Test program for the optional md5 module.
 
 pysvr		An example of embedding Python in a threaded
@@ -45,9 +41,6 @@ sgi		Demos that only run on Silicon Graphics machines.
 		'gl', 'al', and 'sv'.  Split in subdirectories
 		per subject.
 
-stdwin		Demos that use the STDWIN library.  Require the 'stdwin'
-		built-in module.
-
 threads		Demos that use the 'thread' module.  (Currently these
 		only run on SGIs, but this may change in the future.)