image.png: fix using

diff --git a/extra/images/png/png.factor b/extra/images/png/png.factor
index ab2a08d69ab58773e701c8d485f949089529de2e..c01aa0abe3229a02bc26837b29dfd072251fe2db 100644 (file)
--- a/extra/images/png/png.factor
+++ b/extra/images/png/png.factor
@@ -1,6 +1,6 @@
 ! Copyright (C) 2009 Doug Coleman.
 ! See http://factorcode.org/license.txt for BSD license.
-USING: accessors arrays assocs bitstreams checksums
+USING: accessors arrays assocs checksums
 checksums.crc32 combinators compression.inflate endian grouping
 images images.loader io io.encodings.ascii io.encodings.binary
 io.encodings.latin1 io.encodings.string io.streams.byte-array