we require Java 7 now (#5)

* we require Java 7 now
diff --git a/pom.xml b/pom.xml
index e08c190..94d7362 100644
--- a/pom.xml
+++ b/pom.xml
@@ -337,18 +337,6 @@
       <version>2.0</version>
     </dependency>
 
-    <!-- schema validation dependencies : jaxp 1.3 is not included with jdk 1.4 (start with 1.5) -->
-    <dependency>
-      <groupId>xml-apis</groupId>
-      <artifactId>xml-apis</artifactId>
-      <version>1.3.04</version>
-    </dependency>
-    <dependency>
-      <groupId>xerces</groupId>
-      <artifactId>xercesImpl</artifactId>
-      <version>2.9.1</version>
-    </dependency>
-
     <!-- trac dependencies -->
     <dependency>
       <groupId>org.apache.xmlrpc</groupId>