[MPOM-256] Remove unused clirr plugin

diff --git a/pom.xml b/pom.xml
index f26f3d0..2fa656b 100644
--- a/pom.xml
+++ b/pom.xml
@@ -1239,20 +1239,6 @@
       </activation>
       <build>
         <plugins>
-          <!--<plugin>
-          Clirr needs to be more flexble before we can force this everywhere. New releases that don't have previous artifacts to compare cause Clirr to blow up. And Clirr needs to be smart enough to only look at the previous release artifact so we can make this work during snapshot builds, otherwise it just blows up when you try to do a release.
-            <groupId>org.codehaus.mojo</groupId>
-            <artifactId>clirr-maven-plugin</artifactId>
-            <executions>
-              <execution>
-                <id>clirr-check</id>
-                <phase>verify</phase>
-                <goals>
-                  <goal>check</goal>
-                </goals>
-              </execution>
-            </executions>
-          </plugin>-->
           <plugin>
             <groupId>org.apache.maven.plugins</groupId>
             <artifactId>maven-pmd-plugin</artifactId>