Pick up plugin version from commons-parent.

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/codec/trunk@1812200 13f79535-47bb-0310-9956-ffa450edef68

Author: garydgregory

pom.xml

@@ -259,7 +259,6 @@ limitations under the License.
       <plugin>
         <groupId>org.apache.rat</groupId>
         <artifactId>apache-rat-plugin</artifactId>
-        <version>${commons.rat.version}</version>
         <configuration>
           <excludes>
             <exclude>src/site/resources/.htaccess</exclude>