Remove RELAX NG schema and openmc-validate-xml script

docs/source/usersguide/basics.rst

@@ -75,10 +75,7 @@ person. The nested tags *firstname*, *lastname*, *age*, and *occupation*
 indicate characteristics about the person being described.
 
 In much the same way, OpenMC input uses XML tags to describe the geometry, the
-materials, and settings for a Monte Carlo simulation. Note that because the XML
-files have a well-defined structure, they can be validated using the
-:ref:`scripts_validate` script or using :ref:`Emacs nXML mode
-<usersguide_nxml>`.
+materials, and settings for a Monte Carlo simulation.
 
 Creating Input Files
 --------------------

docs/source/usersguide/install.rst

@@ -545,8 +545,7 @@ distributions.
       Uncertainties are used for decay data in the :mod:`openmc.data` module.
 
    `lxml <https://lxml.de/>`_
-      lxml is used for the :ref:`scripts_validate` script and various other
-      parts of the Python API.
+      lxml is used for various parts of the Python API.
 
 .. admonition:: Optional
    :class: note
@@ -590,31 +589,5 @@ wrapper is used when installing h5py:
 
     CC=<path to mpicc> HDF5_MPI=ON HDF5_DIR=<path to HDF5> pip install --no-binary=h5py h5py
 
-.. _usersguide_nxml:
-
------------------------------------------------------
-Configuring Input Validation with GNU Emacs nXML mode
------------------------------------------------------
-
-The `GNU Emacs`_ text editor has a built-in mode that extends functionality for
-editing XML files. One of the features in nXML mode is the ability to perform
-real-time `validation`_ of XML files against a `RELAX NG`_ schema. The OpenMC
-source contains RELAX NG schemas for each type of user input file. In order for
-nXML mode to know about these schemas, you need to tell emacs where to find a
-"locating files" description. Adding the following lines to your ``~/.emacs``
-file will enable real-time validation of XML input files:
-
-.. code-block:: common-lisp
-
-    (require 'rng-loc)
-    (add-to-list 'rng-schema-locating-files "~/openmc/schemas.xml")
-
-Make sure to replace the last string on the second line with the path to the
-schemas.xml file in your own OpenMC source directory.
-
-.. _GNU Emacs: http://www.gnu.org/software/emacs/
-.. _validation: https://en.wikipedia.org/wiki/XML_validation
-.. _RELAX NG: https://relaxng.org/
-.. _ctest: https://cmake.org/cmake/help/latest/manual/ctest.1.html
 .. _Conda: https://conda.io/en/latest/
 .. _pip: https://pip.pypa.io/en/stable/

docs/source/usersguide/scripts.rst

@@ -171,34 +171,6 @@ the latest HDF5-based format.
 -i IN, --input IN    Input XML file
 -o OUT, --output OUT  Output file in HDF5 format
 
-.. _scripts_validate:
-
------------------------
-``openmc-validate-xml``
------------------------
-
-Input files can be checked before executing OpenMC using the
-``openmc-validate-xml`` script which is installed alongside the Python API. Two
-command line arguments can be set when running ``openmc-validate-xml``:
-
--i, --input-path      Location of OpenMC input files.
--r, --relaxng-path    Location of OpenMC RelaxNG files
-
-If the RelaxNG path is not set, the script will search for these files because
-it expects that the user is either running the script located in the install
-directory ``bin`` folder or in ``src/utils``. Once executed, it will match
-OpenMC XML files with their RelaxNG schema and check if they are valid.  Below
-is a table of the messages that will be printed after each file is checked.
-
-========================  ===================================
-Message                   Description
-========================  ===================================
-[XML ERROR]               Cannot parse XML file.
-[NO RELAXNG FOUND]        No RelaxNG file found for XML file.
-[NOT VALID]               XML file does not match RelaxNG.
-[VALID]                   XML file matches RelaxNG.
-========================  ===================================
-
 .. _scripts_voxel:
 
 ---------------------------