Don't bundle busybox with Windows (JuliaLang/julia#30022)

Author: musm

LICENSE.md

@@ -79,7 +79,6 @@ Julia's build process uses the following external tools:
 Julia bundles the following external programs and libraries on some platforms:
 
 - [7-Zip](http://www.7-zip.org/license.txt)
-- [BUSYBOX](https://github.com/rmyorston/busybox-w32/blob/master/LICENSE)
 - [ZLIB](http://zlib.net/zlib_license.html)
 - [LIBEXPAT](http://expat.cvs.sourceforge.net/viewvc/expat/expat/README)