gnu: expat: Eliminate graft.

* gnu/packages/xml.scm (expat): Update to 2.2.1.
[source]: Remove patch.
[replacement]: Remove field.
(expat-2.2.1): Remove variable.
* gnu/packages/patches/expat-CVE-2016-0718-fix-regression.patch: Delete file.
* gnu/local.mk (dist_patch_DATA): Remove it.

gnu/local.mk

@@ -571,7 +571,6 @@ dist_patch_DATA =						\
   %D%/packages/patches/emacs-source-date-epoch.patch		\
   %D%/packages/patches/eudev-rules-directory.patch		\
   %D%/packages/patches/evilwm-lost-focus-bug.patch		\
-  %D%/packages/patches/expat-CVE-2016-0718-fix-regression.patch	\
   %D%/packages/patches/fabric-tests.patch			\
   %D%/packages/patches/fastcap-mulGlobal.patch			\
   %D%/packages/patches/fastcap-mulSetup.patch			\

gnu/packages/patches/expat-CVE-2016-0718-fix-regression.patch

@@ -1,35 +0,0 @@
-Fix regression caused by fix for CVE-2016-0718 when building with -DXML_UNICODE.
-
-Discussion:
-
-https://sourceforge.net/p/expat/bugs/539/
-
-Patch copied from upstream source repository:
-
-https://sourceforge.net/p/expat/code_git/ci/af507cef2c93cb8d40062a0abe43a4f4e9158fb2/
-
-From af507cef2c93cb8d40062a0abe43a4f4e9158fb2 Mon Sep 17 00:00:00 2001
-From: Sebastian Pipping <sebastian@pipping.org>
-Date: Sun, 17 Jul 2016 20:22:29 +0200
-Subject: [PATCH 1/2] Fix regression bug #539 (needs -DXML_UNICODE)
-
-Thanks to Andy Wang and Karl Waclawek!
----
- expat/lib/xmlparse.c | 2 +-
- 1 file changed, 1 insertion(+), 1 deletion(-)
-
-diff --git a/expat/lib/xmlparse.c b/expat/lib/xmlparse.c
-index b308e67..0d5dd7b 100644
---- a/lib/xmlparse.c
-+++ b/lib/xmlparse.c
-@@ -2468,7 +2468,7 @@ doContent(XML_Parser parser,
-                        &fromPtr, rawNameEnd,
-                        (ICHAR **)&toPtr, (ICHAR *)tag->bufEnd - 1);
-             convLen = (int)(toPtr - (XML_Char *)tag->buf);
--            if ((convert_res == XML_CONVERT_COMPLETED) || (convert_res == XML_CONVERT_INPUT_INCOMPLETE)) {
-+            if ((fromPtr >= rawNameEnd) || (convert_res == XML_CONVERT_INPUT_INCOMPLETE)) {
-               tag->name.strLen = convLen;
-               break;
-             }
--- 
-2.10.0

gnu/packages/xml.scm

@@ -55,17 +55,14 @@
 (define-public expat
   (package
     (name "expat")
-    (version "2.2.0")
-    (replacement expat-2.2.1)
+    (version "2.2.1")
     (source (origin
              (method url-fetch)
              (uri (string-append "mirror://sourceforge/expat/expat/"
                                  version "/expat-" version ".tar.bz2"))
-             (patches
-               (search-patches "expat-CVE-2016-0718-fix-regression.patch"))
              (sha256
               (base32
-               "1zq4lnwjlw8s9mmachwfvfjf2x3lk24jm41746ykhdcvs7r0zrfr"))))
+               "11c8jy1wvllvlk7xdc5cm8hdhg0hvs8j0aqy6s702an8wkdcls0q"))))
     (build-system gnu-build-system)
     (home-page "http://www.libexpat.org/")
     (synopsis "Stream-oriented XML parser library written in C")
@@ -75,19 +72,6 @@ stream-oriented parser in which an application registers handlers for
 things the parser might find in the XML document (like start tags).")
     (license license:expat)))
 
-(define expat-2.2.1  ; Fixes CVE-2017-9233, CVE-2016-9063 and other issues.
-  (package
-    (inherit expat)
-    (version "2.2.1")
-    (replacement #f)
-    (source (origin
-             (method url-fetch)
-             (uri (string-append "mirror://sourceforge/expat/expat/"
-                                 version "/expat-" version ".tar.bz2"))
-             (sha256
-              (base32
-               "11c8jy1wvllvlk7xdc5cm8hdhg0hvs8j0aqy6s702an8wkdcls0q"))))))
-
 (define-public libxml2
   (package
     (name "libxml2")