For ImportOrder, "under" already is the default value for "option". Removed it.

git-svn-id: https://svn.apache.org/repos/asf/xmlgraphics/fop/trunk@1304262 13f79535-47bb-0310-9956-ffa450edef68

checkstyle-5.5.xml

@@ -127,7 +127,6 @@
 
     <!-- ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... -->
     <module name="ImportOrder">
-      <property name="option" value="under"/>
       <property name="groups" value="java,javax,org,org.apache,org.apache.batik,org.apache.xmlgraphics,org.apache.fop,com"/>
       <property name="separated" value="true"/>
     </module>