remove examples ref from tree

Author: AndreiKingsley

docs/StardustDocs/d.tree

@@ -196,7 +196,6 @@
     <toc-element topic="Usage-with-Kotlin-Notebook-Plugin.md">
         <toc-element topic="Trobleshooting.md"/>
     </toc-element>
-    <toc-element href="https://github.com/Kotlin/dataframe/tree/master/examples" toc-title="Examples"/>
     <toc-element topic="Compiler-Plugin.md"/>
     <toc-element topic="_shadow_resources.md" hidden="true"/>
     <toc-element topic="_shadow_resources_snippets.md" hidden="true"/>