WW-2815 Drops unused import

Author: lukaszlenart

plugins/rest/src/main/java/org/apache/struts2/rest/handler/XStreamHandler.java

@@ -24,7 +24,6 @@
 import com.thoughtworks.xstream.io.xml.StaxDriver;
 import com.thoughtworks.xstream.security.ArrayTypePermission;
 import com.thoughtworks.xstream.security.ExplicitTypePermission;
-import com.thoughtworks.xstream.security.NoTypePermission;
 import com.thoughtworks.xstream.security.NullPermission;
 import com.thoughtworks.xstream.security.PrimitiveTypePermission;
 import com.thoughtworks.xstream.security.TypePermission;