doc: Removed unused template

doc/en/_templates/indexsidebar.html

@@ -1,22 +0,0 @@
-<h3>Download</h3>
-{% if version.endswith('(hg)') %}
-<p>This documentation is for version <b>{{ version }}</b>, which is
-  not released yet.</p>
-<p>You can use it from the
-  <a href="http://bitbucket.org/hpk42/pytest">Bitbucket Repo</a> or look for
-  released versions in the <a href="http://pypi.python.org/pypi/pytest">Python
-    Package Index</a>.</p>
-{% else %}
-<p><b><a href="{{ pathto('announce/index')}}">{{ release }} release</a></b>
-[<a href="{{ pathto('changelog') }}">Changelog</a>]</p>
-<p>
-<a href="http://pypi.python.org/pypi/pytest">pytest/PyPI</a>
-</p>
-<pre>easy_install pytest</pre>
-<pre>pip install pytest</pre>
-{% endif %}
-
-<h3>Questions? Suggestions?</h3>
-
-<p><a href="{{ pathto('contact') }}">contact channels</a>
-</p>