removed 4 duplicate Visual Source Safe tasks

git-svn-id: https://svn.apache.org/repos/asf/ant/core/trunk@274490 13f79535-47bb-0310-9956-ffa450edef68

src/main/org/apache/tools/ant/taskdefs/defaults.properties

@@ -150,13 +150,9 @@ ccunlock=org.apache.tools.ant.taskdefs.optional.clearcase.CCUnlock
 ccmkbl=org.apache.tools.ant.taskdefs.optional.clearcase.CCMkbl
 sound=org.apache.tools.ant.taskdefs.optional.sound.SoundTask
 junitreport=org.apache.tools.ant.taskdefs.optional.junit.XMLResultAggregator
-vsslabel=org.apache.tools.ant.taskdefs.optional.vss.MSVSSLABEL
-vsshistory=org.apache.tools.ant.taskdefs.optional.vss.MSVSSHISTORY
 blgenclient=org.apache.tools.ant.taskdefs.optional.ejb.BorlandGenerateClient
 rpm=org.apache.tools.ant.taskdefs.optional.Rpm
 xmlvalidate=org.apache.tools.ant.taskdefs.optional.XMLValidateTask
-vsscheckin=org.apache.tools.ant.taskdefs.optional.vss.MSVSSCHECKIN
-vsscheckout=org.apache.tools.ant.taskdefs.optional.vss.MSVSSCHECKOUT
 iplanet-ejbc=org.apache.tools.ant.taskdefs.optional.ejb.IPlanetEjbcTask
 jdepend=org.apache.tools.ant.taskdefs.optional.jdepend.JDependTask
 mimemail=org.apache.tools.ant.taskdefs.optional.net.MimeMail