Remove Comet

git-svn-id: https://svn.apache.org/repos/asf/tomcat/trunk@1636547 13f79535-47bb-0310-9956-ffa450edef68
Remove some empty directories git left behind

git-svn-id: https://svn.apache.org/repos/asf/tomcat/trunk@1636553 13f79535-47bb-0310-9956-ffa450edef68