gnutar: drop obsolete gets-undeclared.patch

pkgs/tools/archivers/gnutar/default.nix

@@ -8,8 +8,6 @@ stdenv.mkDerivation rec {
     sha256 = "0yrwmx2f721ahpnki4fnzvnmrd3md3bq417icb4wrjky7k3caf12";
   };
 
-  patches = [ ./gets-undeclared.patch ];
-
   # May have some issues with root compilation because the bootstrap tool
   # cannot be used as a login shell for now.
   FORCE_UNSAFE_CONFIGURE = stdenv.lib.optionalString (stdenv.system == "armv7l-linux" || stdenv.isSunOS) "1";

pkgs/tools/archivers/gnutar/gets-undeclared.patch

@@ -1,26 +0,0 @@
-This patch is needed to allow builds with newer versions of
-the GNU libc (2.16+).
-
-This is a backport of this patch:
-
-commit 66712c23388e93e5c518ebc8515140fa0c807348
-Author: Eric Blake <eblake@redhat.com>
-Date:   Thu Mar 29 13:30:41 2012 -0600
-
-    stdio: don't assume gets any more
-    
---- tar-1.26/gnu/stdio.in.h	2012-07-02 14:28:45.000000000 +0200
-+++ tar-1.26/gnu/stdio.in.h	2012-07-02 14:28:50.000000000 +0200
-@@ -160,12 +160,6 @@ _GL_WARN_ON_USE (fflush, "fflush is not
-                  "use gnulib module fflush for portable POSIX compliance");
- #endif
- 
--/* It is very rare that the developer ever has full control of stdin,
--   so any use of gets warrants an unconditional warning.  Assume it is
--   always declared, since it is required by C89.  */
--#undef gets
--_GL_WARN_ON_USE (gets, "gets is a security hole - use fgets instead");
--
- #if @GNULIB_FOPEN@
- # if @REPLACE_FOPEN@
- #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)