build: Remove --with-xml-catalog-file option

After validation against XHTML 1.0 was dropped in f802c9de,
the XML_CATALOG_FILE is not in use anymore. Therefore the checks in
configure can be removed.
Signed-off-by: NRainer Müller <raimue@codingfarm.de>

configure.ac

@@ -459,7 +459,6 @@ dnl
 LIBVIRT_ARG_DEBUG
 LIBVIRT_ARG_DTRACE
 LIBVIRT_ARG_NUMAD
-LIBVIRT_ARG_XML_CATALOG
 LIBVIRT_ARG_INIT_SCRIPT
 LIBVIRT_ARG_CHRDEV_LOCK_FILES
 LIBVIRT_ARG_DEFAULT_EDITOR
@@ -473,7 +472,6 @@ LIBVIRT_ARG_SYSCTL_CONFIG
 LIBVIRT_CHECK_DEBUG
 LIBVIRT_CHECK_DTRACE
 LIBVIRT_CHECK_NUMAD
-LIBVIRT_CHECK_XML_CATALOG
 LIBVIRT_CHECK_INIT_SCRIPT
 LIBVIRT_CHECK_CHRDEV_LOCK_FILES
 LIBVIRT_CHECK_DEFAULT_EDITOR
@@ -1032,7 +1030,6 @@ AC_MSG_NOTICE([       Use -Werror: $enable_werror])
 AC_MSG_NOTICE([     Warning Flags: $WARN_CFLAGS])
 LIBVIRT_RESULT_DTRACE
 LIBVIRT_RESULT_NUMAD
-LIBVIRT_RESULT_XML_CATALOG
 LIBVIRT_RESULT_INIT_SCRIPT
 LIBVIRT_RESULT_CHRDEV_LOCK_FILES
 LIBVIRT_RESULT_DEFAULT_EDITOR

m4/virt-xml-catalog.m4

-dnl The XML catalog file check
-dnl
-dnl Copyright (C) 2016 Red Hat, Inc.
-dnl
-dnl This library is free software; you can redistribute it and/or
-dnl modify it under the terms of the GNU Lesser General Public
-dnl License as published by the Free Software Foundation; either
-dnl version 2.1 of the License, or (at your option) any later version.
-dnl
-dnl This library is distributed in the hope that it will be useful,
-dnl but WITHOUT ANY WARRANTY; without even the implied warranty of
-dnl MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-dnl Lesser General Public License for more details.
-dnl
-dnl You should have received a copy of the GNU Lesser General Public
-dnl License along with this library.  If not, see
-dnl <http://www.gnu.org/licenses/>.
-dnl
-
-AC_DEFUN([LIBVIRT_ARG_XML_CATALOG], [
-  LIBVIRT_ARG_WITH([XML_CATALOG_FILE],
-                   [path to XML catalog file for validating generated html],
-                   ['/etc/xml/catalog'])
-])
-
-AC_DEFUN([LIBVIRT_CHECK_XML_CATALOG], [
-  dnl Specific XML catalog file for validation of generated html
-  AC_SUBST([XML_CATALOG_FILE], [$with_xml_catalog_file])
-])
-
-AC_DEFUN([LIBVIRT_RESULT_XML_CATALOG], [
-  AC_MSG_NOTICE([       XML Catalog: $with_xml_catalog_file])
-])