Removed zlib line, since the source files no longer exist. I don't

know whether this file *should* be used anymore, though.  But if it isn't,
I would have expected "someone" to have removed it by now.

lib/python/Setup20

@@ -15,7 +15,4 @@ IOBTree        ../Components/BTree/IOBTree.c  -I../Components/ExtensionClass/src
 OIBTree        ../Components/BTree/OIBTree.c  -I../Components/ExtensionClass/src  -I../Components/BTree -I./ZODB
 intSet         ../Components/BTree/intSet.c   -I../Components/ExtensionClass/src  -I../Components/BTree -I./ZODB
 
-
-zlib ../Components/zlib/zlib.c -I../Components/zlib ../Components/zlib/adler32.c ../Components/zlib/compress.c ../Components/zlib/crc32.c ../Components/zlib/gzio.c ../Components/zlib/uncompr.c ../Components/zlib/deflate.c ../Components/zlib/trees.c ../Components/zlib/zutil.c ../Components/zlib/inflate.c ../Components/zlib/infblock.c ../Components/zlib/inftrees.c ../Components/zlib/infcodes.c ../Components/zlib/infutil.c ../Components/zlib/inffast.c
-
 initgroups	../Components/initgroups/initgroups.c