fixed debug output which made all jobs fail in helper.groovy

vars/helper.groovy

@@ -143,7 +143,6 @@ def doPrepare(boolean checkoutScm, String gitUrl='') {
         whoami
         sudo -H -E -u msk_jenkins ls -l
         sudo -H -E -u msk_jenkins pwd
-        sudo -H -E -u msk_jenkins ls -l ~
         echo END DEBUG
      '''
       sh 'sudo -H -E -u msk_jenkins git submodule update --init --recursive'