Remove PMD (causing build failures).

project.xml

@@ -419,7 +419,6 @@
     <report>maven-jdepend-plugin</report>
     <report>maven-junit-report-plugin</report>
     <report>maven-jxr-plugin</report>
-    <report>maven-pmd-plugin</report>
     <report>maven-simian-plugin</report>
     <report>maven-tasklist-plugin</report>
     <report>maven-findbugs-plugin</report>