gnu: Remove (gnu packages mercury).

* gnu/packages/mercury.scm: Remove file.
* gnu/local.mk (GNU_SYSTEM_MODULES), po/packages/POTFILES.in: Unregister
file.

Fixes: guix/guix#6527
Change-Id: If5abf7b6574be1e4f56b2c0099d3f1c29816658c

gnu/local.mk

@@ -479,7 +479,6 @@ GNU_SYSTEM_MODULES =				\
   %D%/packages/mc.scm				\
   %D%/packages/mcrypt.scm			\
   %D%/packages/medical.scm			\
-  %D%/packages/mercury.scm			\
   %D%/packages/mes.scm				\
   %D%/packages/messaging.scm			\
   %D%/packages/minetest.scm			\

gnu/packages/mercury.scm

@@ -1,52 +0,0 @@
-;;; GNU Guix --- Functional package management for GNU
-;;; Copyright © 2020 Brett Gilio <brettg@gnu.org>
-;;; Copyright © 2022 jgart <jgart@dismail.de>
-;;;
-;;; This file is part of GNU Guix.
-;;;
-;;; GNU Guix is free software; you can redistribute it and/or modify it
-;;; under the terms of the GNU General Public License as published by
-;;; the Free Software Foundation; either version 3 of the License, or (at
-;;; your option) any later version.
-;;;
-;;; GNU Guix is distributed in the hope that it will be useful, but
-;;; WITHOUT ANY WARRANTY; without even the implied warranty of
-;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-;;; GNU General Public License for more details.
-;;;
-;;; You should have received a copy of the GNU General Public License
-;;; along with GNU Guix.  If not, see <http://www.gnu.org/licenses/>.
-
-(define-module (gnu packages mercury)
-  #:use-module (guix download)
-  #:use-module (guix git-download)
-  #:use-module (guix packages)
-  #:use-module (guix utils)
-  #:use-module ((guix licenses) #:prefix license:)
-  #:use-module (guix build-system gnu)
-  #:use-module (gnu packages autotools)
-  #:use-module (gnu packages bdw-gc)
-  #:use-module (gnu packages readline)
-  #:use-module (gnu packages texinfo)
-  #:use-module (gnu packages flex)
-  #:use-module (gnu packages shells)
-  #:use-module (gnu packages bison)
-  #:use-module (gnu packages pkg-config)
-  #:use-module ((ice-9 match) #:select (match-lambda)))
-
-;; NOTE: Mercury uses a tightly coupled fork of BDWGC and
-;; libatomic-ops. When updating the package, please check the GitHub
-;; repository to ensure that the submodule commit matches what is
-;; provided.
-(define (gc-fork package-name package-url
-                 package-commit package-hash)
-  (let ((commit package-commit))
-    (package (inherit package-name)
-             (source
-              (origin
-                (method git-fetch)
-                (uri (git-reference
-                      (url package-url)
-                      (commit commit)))
-                (sha256 (base32 package-hash)))))))
-

po/packages/POTFILES.in

@@ -431,7 +431,6 @@ gnu/packages/maths.scm
 gnu/packages/matrix.scm
 gnu/packages/maven-parent-pom.scm
 gnu/packages/medical.scm
-gnu/packages/mercury.scm
 gnu/packages/mes.scm
 gnu/packages/messaging.scm
 gnu/packages/mingw.scm