Removed RedundantThrows module which is not supported after 6.2.

As Eclipse checkstyle plugin uses a more recent version of checkstyle,
this module created problems. The same problems will certainly arise
with maven plugin when it is updated to post 6.2 versions.

checkstyle.xml

@@ -47,12 +47,6 @@
       <property name="allowThrowsTagsForSubclasses" value="true"/>
     </module>
 
-   <!-- Allow declaration of detailed exception set -->
-   <module name="RedundantThrows">
-     <property name="allowUnchecked"  value="true"/>
-     <property name="allowSubclasses" value="true"/>
-   </module>
-        
     <!-- Require field javadoc -->
     <module name="JavadocVariable"/>