TIEro

This plugin is now available as part of <a href="https://wordpress.org/plugins/tietools-automatic-maintenance-kit/" title="TIEtools" rel="ugc">TIEtools</a>, which also includes post expiry and duplicate post control.
An extremely simple plugin which removes accumulated error log files from your web space. It is VERY important to note that the plugin does no checking or any complex stuff: it just removes error logs. Please read the FAQ before you activate this plugin.

TIElogremover

An extremely simple plugin which removes accumulated error log files from your web space.

ramon fincken

Auto deletes expires (prunes) posts or pages after a certain amount of time. On a per category basis (single category, or all at once). 
Handy if you want to have posts with a limited timeframe such as offers, coupons etc.. 
Posts will auto delete on a per category basis: single category OR all categories at once. 
All (custom)post types are supported. (CPT support) 
Will also trash post attachments. 
Sends notification to site admin (can be turned off). 
No cronjob needed 🙂
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<li>Coding by: <a href="https://www.mijnpress.nl" rel="nofollow ugc">MijnPress.nl</a> <a href="https://mastodon.social/@ramonfincken" rel="nofollow ugc">Mastodon profile</a> <a href="https://profiles.wordpress.org/ramon-fincken/" rel="nofollow ugc">More plugins</a></li>
<li>Idea by <a href="https://www.nostromo.nl" rel="nofollow ugc">Nostromo.nl</a></li>
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Auto Prune Posts

Needs to be updated; too many errors thrown. Hopefully this will be attended to as it's a really useful plugin otherwise.

Throws errors on activation.

Auto deletes expires (prunes) posts after a certain amount of time. On a per category basis (single category, or all at once.

TIElogremover vs Auto Prune Posts