Remove left over rm -rf command from BYFN (#148)

Signed-off-by: NIKHIL E GUPTA <negupta@us.ibm.com>

Co-authored-by: NIKHIL E GUPTA <negupta@us.ibm.com>

Author: nikhil550

test-network/network.sh

@@ -389,8 +389,6 @@ function networkDown() {
   # Don't remove the generated artifacts -- note, the ledgers are always removed
   if [ "$MODE" != "restart" ]; then
     # Bring down the network, deleting the volumes
-    #Delete any ledger backups
-    docker run -v $PWD:/tmp/first-network --rm hyperledger/fabric-tools:$IMAGETAG rm -Rf /tmp/first-network/ledgers-backup
     #Cleanup the chaincode containers
     clearContainers
     #Cleanup images