[FAB-16284] Remove E2E file and -f option from BYFN

Remove leftover call to removed ReplacePrivateKey function which
makes calling ./byfn.sh up fail if cryptogen hasn't been run first.

Signed-off-by: Arnaud J Le Hors <lehors@us.ibm.com>

first-network/byfn.sh

@@ -153,7 +153,6 @@ function networkUp() {
   # generate artifacts if they don't exist
   if [ ! -d "crypto-config" ]; then
     generateCerts
-    replacePrivateKey
     generateChannelArtifacts
   fi
   COMPOSE_FILES="-f ${COMPOSE_FILE} -f ${COMPOSE_FILE_RAFT2}"