DOC: removed truncate example

Author: Liudmila Mantrova

doc/src/sgml/in-memory.sgml

@@ -280,12 +280,7 @@ Execution time: 0.353 ms
       <literal>RESTART IDENTITY</literal>,
       <literal>CONTINUE IDENTITY</literal>, <literal>CASCADE</literal>,
       and <literal>RESTRICT</literal> options of the <command>TRUNCATE</command> command
-      are not supported by in-memory tables. To truncate an in-memory
-      table, you must specify its name directly. For example:
-    <programlisting>
-# TRUNCATE blog_views;
-TRUNCATE TABLE
-</programlisting>
+      are not supported by in-memory tables.
       </para>
 
 </sect3>