gnu: Remove readline-6.2.

* gnu/packages/readline.scm (readline-6.2): Delete variable.
* gnu/packages/patches/readline-6.2-CVE-2014-2524.patch: Remove file.
* gnu/packages/readline.scm (dist_patch_DATA): Unregister patch.

Fixes: guix/guix#3611
Change-Id: I87c33c44bff9003948cb2b1a7d3c09af9a642892

gnu/local.mk

@@ -2219,7 +2219,6 @@ dist_patch_DATA =						\
   %D%/packages/patches/retroarch-unbundle-spirv-cross.patch	\
   %D%/packages/patches/rct-add-missing-headers.patch		\
   %D%/packages/patches/readline-link-ncurses.patch		\
-  %D%/packages/patches/readline-6.2-CVE-2014-2524.patch		\
   %D%/packages/patches/renpy-use-system-fribidi.patch		\
   %D%/packages/patches/reposurgeon-add-missing-docbook-files.patch	\
   %D%/packages/patches/rdkit-unbundle-external-dependencies.patch	\

gnu/packages/patches/readline-6.2-CVE-2014-2524.patch

@@ -1,42 +0,0 @@
-Fix CVE-2014-2524:
-
-https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-2524
-http://lists.gnu.org/archive/html/bug-readline/2014-03/msg00057.html
-
-Patch copied from:
-https://ftp.gnu.org/gnu/readline/readline-6.3-patches/readline63-003
-
-			   READLINE PATCH REPORT
-			   =====================
-
-Readline-Release: 6.3
-Patch-ID: readline63-003
-
-Bug-Reported-by:
-Bug-Reference-ID:
-Bug-Reference-URL:
-
-Bug-Description:
-
-There are debugging functions in the readline release that are theoretically
-exploitable as security problems.  They are not public functions, but have
-global linkage.
-
-Patch (apply with `patch -p0'):
-
-*** ../readline-6.3/util.c	2013-09-02 13:36:12.000000000 -0400
---- util.c	2014-03-20 10:25:53.000000000 -0400
-***************
-*** 477,480 ****
---- 479,483 ----
-  }
-  
-+ #if defined (DEBUG)
-  #if defined (USE_VARARGS)
-  static FILE *_rl_tracefp;
-***************
-*** 539,542 ****
---- 542,546 ----
-  }
-  #endif
-+ #endif /* DEBUG */

gnu/packages/readline.scm

@@ -160,19 +160,6 @@ comfortable for anyone.")
                         (search-patches "readline-link-ncurses.patch")))
               (patch-flags '("-p0"))))))
 
-(define-public readline-6.2
-  (package (inherit readline)
-    (version "6.2")
-    (source (origin (inherit (package-source readline))
-              (method url-fetch)
-              (uri (string-append "mirror://gnu/readline/readline-"
-                                  version ".tar.gz"))
-              (patches (search-patches "readline-6.2-CVE-2014-2524.patch"))
-              (patch-flags '("-p0"))
-              (sha256
-               (base32
-                "10ckm2bd2rkxhvdmj7nmbsylmihw0abwcsnxf8y27305183rd9kr"))))))
-
 (define-public rlwrap
   (package
     (name "rlwrap")