Revert 205057 "Add JSON.pm to third_party"

trunk/src/third_party/JSON/JSON-2.59/t/xe20_croak_message.t

Index: trunk/src/third_party/JSON/JSON-2.59/t/xe20_croak_message.t
===================================================================
--- trunk/src/third_party/JSON/JSON-2.59/t/xe20_croak_message.t	(revision 205060)
+++ trunk/src/third_party/JSON/JSON-2.59/t/xe20_croak_message.t	(working copy)
@@ -1,22 +0,0 @@
-#! perl
-
-# https://rt.cpan.org/Public/Bug/Display.html?id=61708
-
-use strict;
-use Test::More;
-
-BEGIN { plan tests => 1 };
-BEGIN { $ENV{PERL_JSON_BACKEND} = 1; }
-
-use JSON; # currently it can't pass with -support_by_pp;
-
-
-SKIP: {
-    skip "can't use JSON::XS.", 1, unless( JSON->backend->is_xs );
-
-    my $json = JSON->new;
-
-    eval q{ $json->encode( undef ) };
-    like( $@, qr/line 1\./ );
-}
-