A CSL style reduced to its essential elements. (Technically bibliography isn't necessary either).

basic-style.csl

<?xml version="1.0" encoding="utf-8"?>
<style xmlns="http://purl.org/net/xbiblio/csl" class="in-text" version="1.0">
  <info>
    <title>Basic Style</title>
    <id>http://www.zotero.org/styles/basic-style</id>
    <link href="http://www.zotero.org/styles/basic-style" rel="self"/>
    <author>
      <name>Sebastian Karcher</name>
    </author>
    <category citation-format="author-date"/>
    <category field="generic"/>
    <updated>2015-10-04T19:32:17+00:00</updated>
    <rights license="http://creativecommons.org/licenses/by-sa/3.0/">This work is licensed under a Creative Commons Attribution-ShareAlike 3.0 License</rights>
  </info>
  <citation>
    <layout>
     <text variable="title"/>
    </layout>
  </citation>
  <bibliography >
    <layout>
      <text variable="title"/>
    </layout>
  </bibliography>
</style>