diff --git a/doc/ext/LICENSE.txt b/doc/ext/LICENSE.txt
index c955e175..221539c2 100644
--- a/doc/ext/LICENSE.txt
+++ b/doc/ext/LICENSE.txt
@@ -11,12 +11,11 @@ Copyright (C) 2008 Stefan van der Walt <stefan@mentat.za.net>,
 
 and are distributed under the modified BSD license.
 
-The files
+The file
 
-- only_directives.py
 - plot_directive.py
 
-originate from Matplotlib (http://matplotlib.sf.net/) which has the
+originates from Matplotlib (http://matplotlib.sf.net/) which has the
 following license:
 
 Copyright (c) 2002-2008 John D. Hunter; All Rights Reserved.
diff --git a/doc/ext/only_directives.py b/doc/ext/only_directives.py
deleted file mode 100644
index c0dff7e6..00000000
--- a/doc/ext/only_directives.py
+++ /dev/null
@@ -1,96 +0,0 @@
-#
-# A pair of directives for inserting content that will only appear in
-# either html or latex.
-#
-
-from docutils.nodes import Body, Element
-from docutils.writers.html4css1 import HTMLTranslator
-try:
-    from sphinx.latexwriter import LaTeXTranslator
-except ImportError:
-    from sphinx.writers.latex import LaTeXTranslator
-
-    import warnings
-    warnings.warn("The numpydoc.only_directives module is deprecated;"
-                  "please use the only:: directive available in Sphinx >= 0.6",
-                  DeprecationWarning, stacklevel=2)
-
-from docutils.parsers.rst import directives
-
-class html_only(Body, Element):
-    pass
-
-class latex_only(Body, Element):
-    pass
-
-def run(content, node_class, state, content_offset):
-    text = '\n'.join(content)
-    node = node_class(text)
-    state.nested_parse(content, content_offset, node)
-    return [node]
-
-try:
-    from docutils.parsers.rst import Directive
-except ImportError:
-    from docutils.parsers.rst.directives import _directives
-
-    def html_only_directive(name, arguments, options, content, lineno,
-                            content_offset, block_text, state, state_machine):
-        return run(content, html_only, state, content_offset)
-
-    def latex_only_directive(name, arguments, options, content, lineno,
-                             content_offset, block_text, state, state_machine):
-        return run(content, latex_only, state, content_offset)
-
-    for func in (html_only_directive, latex_only_directive):
-        func.content = 1
-        func.options = {}
-        func.arguments = None
-
-    _directives['htmlonly'] = html_only_directive
-    _directives['latexonly'] = latex_only_directive
-else:
-    class OnlyDirective(Directive):
-        has_content = True
-        required_arguments = 0
-        optional_arguments = 0
-        final_argument_whitespace = True
-        option_spec = {}
-
-        def run(self):
-            self.assert_has_content()
-            return run(self.content, self.node_class,
-                       self.state, self.content_offset)
-
-    class HtmlOnlyDirective(OnlyDirective):
-        node_class = html_only
-
-    class LatexOnlyDirective(OnlyDirective):
-        node_class = latex_only
-
-    directives.register_directive('htmlonly', HtmlOnlyDirective)
-    directives.register_directive('latexonly', LatexOnlyDirective)
-
-def setup(app):
-    app.add_node(html_only)
-    app.add_node(latex_only)
-
-    # Add visit/depart methods to HTML-Translator:
-    def visit_perform(self, node):
-        pass
-    def depart_perform(self, node):
-        pass
-    def visit_ignore(self, node):
-        node.children = []
-    def depart_ignore(self, node):
-        node.children = []
-
-    HTMLTranslator.visit_html_only = visit_perform
-    HTMLTranslator.depart_html_only = depart_perform
-    HTMLTranslator.visit_latex_only = visit_ignore
-    HTMLTranslator.depart_latex_only = depart_ignore
-
-    LaTeXTranslator.visit_html_only = visit_ignore
-    LaTeXTranslator.depart_html_only = depart_ignore
-    LaTeXTranslator.visit_latex_only = visit_perform
-    LaTeXTranslator.depart_latex_only = depart_perform
diff --git a/doc/source/conf.py b/doc/source/conf.py
index b5c7a1c0..793d8cf8 100644
--- a/doc/source/conf.py
+++ b/doc/source/conf.py
@@ -27,7 +27,7 @@ sys.path.append(os.path.join(curpath, '..', 'ext'))
 # coming with Sphinx (named 'sphinx.ext.*') or your custom ones.
 extensions = ['sphinx.ext.autodoc', 'sphinx.ext.pngmath', 'numpydoc',
               'sphinx.ext.autosummary', 'sphinx.ext.inheritance_diagram',
-              'only_directives', 'plot_directive']
+              'plot_directive']
 
 # Add any paths that contain templates here, relative to this directory.
 templates_path = ['_templates']