windows: finally fix gzip redefinition warnings

CMakeLists.txt

@@ -991,8 +991,6 @@ if (LWS_WITH_ZLIB)
 				${WIN32_ZLIB_PATH}/compress.c
 				${WIN32_ZLIB_PATH}/crc32.c
 				${WIN32_ZLIB_PATH}/deflate.c
-				${WIN32_ZLIB_PATH}/gzclose.c
-				${WIN32_ZLIB_PATH}/gzio.c
 				${WIN32_ZLIB_PATH}/gzlib.c
 				${WIN32_ZLIB_PATH}/gzread.c
 				${WIN32_ZLIB_PATH}/gzwrite.c

win32port/zlib/gzclose.c

@@ -1,25 +0,0 @@
-/* gzclose.c -- zlib gzclose() function
- * Copyright (C) 2004, 2010 Mark Adler
- * For conditions of distribution and use, see copyright notice in zlib.h
- */
-
-#include "gzguts.h"
-
-/* gzclose() is in a separate file so that it is linked in only if it is used.
-   That way the other gzclose functions can be used instead to avoid linking in
-   unneeded compression or decompression routines. */
-int ZEXPORT gzclose(file)
-    gzFile file;
-{
-#ifndef NO_GZCOMPRESS
-    gz_statep state;
-
-    if (file == NULL)
-        return Z_STREAM_ERROR;
-    state = (gz_statep)file;
-
-    return state->mode == GZ_READ ? gzclose_r(file) : gzclose_w(file);
-#else
-    return gzclose_r(file);
-#endif
-}