feat(02-samples): remove unwanted cat/eof commands in the example file

Author: Ayush Jha

02-samples/19-sre-incident-response-agent/.env.example

@@ -1,4 +1,3 @@
-cat > 02-samples/19-sre-incident-response-agent/.env.example << 'EOF'
 # AWS Configuration
 AWS_REGION=us-east-1
 
@@ -11,5 +10,4 @@ DRY_RUN=true
 
 # Optional: Slack Incoming Webhook URL for posting incident reports.
 # Leave blank to print the report to stdout instead.
-SLACK_WEBHOOK_URL=
-EOF
+SLACK_WEBHOOK_URL=