no need of prerequisites section

Signed-off-by: olivier lamy <olamy@apache.org>

pom.xml

@@ -19,9 +19,6 @@
   -->
 <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
   <modelVersion>4.0.0</modelVersion>
-  <prerequisites>
-    <maven>3.0.5</maven>
-  </prerequisites>
 
   <parent>
     <groupId>org.apache.archiva</groupId>