removed unnecessary clean up steps

Signed-off-by: racket2000 <56010597+racket2000@users.noreply.github.com>

Author: racket2000

lib/xrp/README.md

@@ -190,10 +190,6 @@ You will get a response similar to this:
 Destroy HA Nodes, Single Nodes and Common stacks
 
 ```bash
-# Setting the AWS account id and region in case local .env file is lost
- export AWS_ACCOUNT_ID=<your_target_AWS_account_id>
- export AWS_REGION=<your_target_AWS_region>
-
 pwd
 # Make sure you are in aws-blockchain-node-runners/lib/xrp