V9.0.2 Unwanted files

Local setup with a custom theme. No ‘features’ or ‘assets’ called in ‘page_theme.php’. Source code is showing four css and two js files!
Can I prevent them from showing or do I need them for my custom image block, custom search block template and navigation?

<link href="/v902/concrete/css/features/search/frontend.css?ccm_nocache=34de1dec9142b49ac43c293c3245415a46e98bc7" rel="stylesheet" type="text/css" media="all">
<link href="/v902/concrete/css/features/navigation/frontend.css?ccm_nocache=34de1dec9142b49ac43c293c3245415a46e98bc7" rel="stylesheet" type="text/css" media="all">
<link href="/v902/concrete/css/features/basics/frontend.css?ccm_nocache=34de1dec9142b49ac43c293c3245415a46e98bc7" rel="stylesheet" type="text/css" media="all">
<link href="/v902/concrete/css/features/imagery/frontend.css?ccm_nocache=34de1dec9142b49ac43c293c3245415a46e98bc7" rel="stylesheet" type="text/css" media="all">

<script type="text/javascript" src="/v902/concrete/js/features/navigation/frontend.js?ccm_nocache=34de1dec9142b49ac43c293c3245415a46e98bc7"></script>
<script type="text/javascript" src="/v902/concrete/js/features/imagery/frontend.js?ccm_nocache=34de1dec9142b49ac43c293c3245415a46e98bc7"></script>

Forget last post. Not going to use V9. My test sites become bloated and slow.