Removed hard coded version for maven-changes-plugin and let the parent do it's work.

git-svn-id: https://svn.apache.org/repos/asf/maven/shared/trunk@1713219 13f79535-47bb-0310-9956-ffa450edef68

pom.xml

diff --git a/pom.xml b/pom.xml
index 037e53d..f9bdfc9 100644
--- a/pom.xml
+++ b/pom.xml
@@ -93,7 +93,6 @@
           <plugin>
             <groupId>org.apache.maven.plugins</groupId>
             <artifactId>maven-changes-plugin</artifactId>
-            <version>2.9</version>
             <configuration>
               <columnNames>Type,Key,Summary,Assignee,Status,Resolution,Created</columnNames>
               <maxEntries>200</maxEntries>