chore: revert changes

Signed-off-by: Kevin Shan <[email protected]>

Author: Siqi-Shan

shared-scripts.sh

@@ -364,10 +364,6 @@ function useChildAccountCredentials {
           echo "Unable to find a child account. Falling back to parent AWS account"
           return
         fi
-        unset AWS_ACCESS_KEY_ID
-        unset AWS_SECRET_ACCESS_KEY
-        unset AWS_SESSION_TOKEN
-
         creds=$(aws sts assume-role --role-arn arn:aws:iam::${pick_acct}:role/OrganizationAccountAccessRole --role-session-name testSession${session_id} --duration-seconds 3600)
         if [ -z $(echo $creds | jq -c -r '.AssumedRoleUser.Arn') ]; then
             echo "Unable to assume child account role. Falling back to parent AWS account"