[FAB-11577] Fix balance transfer to install Chaincode

Balance transfer fails to install Chaincode since there is a
undeclared variable "tx_id". However, "tx_id" is not required
in ChaincodeInstallRequest.
This CR removes the line getting transactionId to execute
installChaincode correctly.

Change-Id: Ia62844172ceecd84fa9a9f2e40e804d1f7a7499b
Signed-off-by: Yuki Kondo <yuki.kondo@hal.hitachi.com>

balance-transfer/app/install-chaincode.js

@@ -30,7 +30,6 @@ var installChaincode = async function(peers, chaincodeName, chaincodePath,
  var client = await helper.getClientForOrg(org_name, username);
  logger.debug('Successfully got the fabric client for the organization "%s"', org_name);
 
- tx_id = client.newTransactionID(true); //get an admin transactionID
  var request = {
  targets: peers,
  chaincodePath: chaincodePath,