Update ignite-config.xml.jinja2

Author: nizhikov

tests/config/ignite-config.xml.jinja2

@@ -27,7 +27,6 @@
         http://www.springframework.org/schema/util/spring-util.xsd">
 
     <bean id="grid.cfg" class="org.apache.ignite.configuration.IgniteConfiguration">
-        <!-- The tests and the examples use the SQL dialect of the H2-based engine. -->
         <property name="sqlConfiguration">
             <bean class="org.apache.ignite.configuration.SqlConfiguration">
                 <property name="queryEnginesConfiguration">