diff --git a/lib/libz/zlib.def b/lib/libz/zlib.def
deleted file mode 100644
index 08c6d5501a4f..000000000000
--- a/lib/libz/zlib.def
+++ /dev/null
@@ -1,46 +0,0 @@
-LIBRARY		"zlib"
-
-DESCRIPTION	'"""zlib data compression library"""'
-
-EXETYPE		NT
-
-SUBSYSTEM	WINDOWS
-
-STUB		'WINSTUB.EXE'
-
-VERSION		1.04
-
-CODE		 EXECUTE READ
-
-DATA		 READ WRITE
-
-HEAPSIZE	1048576,4096
-
-EXPORTS
-		zlibVersion
-		deflate
-		deflateEnd
-		inflate
-		inflateEnd
-		deflateSetDictionary
-		deflateCopy
-		deflateReset
-		deflateParams
-		inflateSetDictionary
-		inflateSync
-		inflateReset
-		compress
-		uncompress
-		gzopen
-		gzdopen
-		gzread
-		gzwrite
-		gzflush
-		gzclose
-		gzerror
-		adler32
-		crc32
-		deflateInit_
-		inflateInit_
-		deflateInit2_
-		inflateInit2_