params argument is optional for eth_syncing call

Signed-off-by: Jakub Sokołowski <jakub@status.im>

tasks/consul.yml

@@ -8,7 +8,7 @@
       set -e
       echo -n "Geth synced: "
       RESP=$(curl -s -X POST -H 'Content-type:application/json' \
-                 --data '{"jsonrpc":"2.0","method":"eth_syncing","params":[],"id":1}' \
+                 --data '{"jsonrpc":"2.0","method":"eth_syncing","id":1}' \
                  http://localhost:{{ geth_rpc_port }}/)
       echo "${RESP}" | jq -e ".result == false" \
           || ( echo "${RESP}" | jq . ; exit 1 )