ci: remove py2-rust support
Nobody cares about this very narrow usecase, and py2 support is over by
July 1st. This helps with the CI load, and removes some flakiness.
<div>
<a class="title" href="{url|urlescape}rev/{node|short}{sessionvars%urlparameter}">
<span class="age">{date|rfc822date}</span>
{desc|strip|firstline|escape|nonempty}
{alltags}
</a>
</div>
<div class="title_text">
<div class="log_link">
<a href="{url|urlescape}rev/{node|short}{sessionvars%urlparameter}">changeset</a><br/>
</div>
<i>{author|obfuscate} [{date|rfc822date}] rev {rev}</i><br/>
</div>
<div class="log_body description">{desc|strip|escape|websub|nonempty}
</div>