remove --machines from code and docs

hack/local-up-cluster.sh

@@ -228,7 +228,6 @@ function start_controller_manager {
     CTLRMGR_LOG=/tmp/kube-controller-manager.log
     sudo -E "${GO_OUT}/kube-controller-manager" \
       --v=${LOG_LEVEL} \
-      --machines="127.0.0.1" \
       --service_account_private_key_file="${SERVICE_ACCOUNT_KEY}" \
       --master="${API_HOST}:${API_PORT}" >"${CTLRMGR_LOG}" 2>&1 &
     CTLRMGR_PID=$!

hack/test-cmd.sh

@@ -103,7 +103,6 @@ kube::util::wait_for_url "http://127.0.0.1:${API_PORT}/healthz" "apiserver"
 # Start controller manager
 kube::log::status "Starting controller-manager"
 "${KUBE_OUTPUT_HOSTBIN}/kube-controller-manager" \
-  --machines="127.0.0.1" \
   --port="${CTLRMGR_PORT}" \
   --master="127.0.0.1:${API_PORT}" 1>&2 &
 CTLRMGR_PID=$!