Removing notificationEmail from  physical test pipeline

Change-Id: I2dac959f787c613dc6f6a71cab484cac3ebbef5c
diff --git a/jjb/pipeline/voltha-dt-physical-functional-tests.groovy b/jjb/pipeline/voltha-dt-physical-functional-tests.groovy
index 41419f8..0f9d373 100644
--- a/jjb/pipeline/voltha-dt-physical-functional-tests.groovy
+++ b/jjb/pipeline/voltha-dt-physical-functional-tests.groovy
@@ -357,8 +357,5 @@
         ]);
       archiveArtifacts artifacts: '*.log,*.gz,*.tgz,etcd/*.log,*.txt'
     }
-    unstable {
-      step([$class: 'Mailer', notifyEveryUnstableBuild: true, recipients: "${notificationEmail}", sendToIndividuals: false])
-    }
   }
 }