Revert "Add production deployment workflow"

This reverts commit 2dcafa8.

Author: harshavemula-ua

.github/workflows/deploy_datastream.yml

@@ -61,9 +61,8 @@ Multiple environments are supported via separate backend and variable files:
 | Environment | Backend Config | Variables | State Machine | Purpose |
 |-------------|----------------|-----------|---------------|---------|
 | dev | `backend-dev.hcl` | `variables.tfvars` | `nrds_dev_sm` | Local development |
-| test | `backend-test.hcl` | `variables-test.tfvars` | `nrds_test_sm` | CI/CD testing (`infra_deploy_val.yaml`) |
+| test | `backend-test.hcl` | `variables-test.tfvars` | `nrds_test_sm` | CI/CD testing (`infra_deploy.yml`) |
 | healthcheck | `backend-healthcheck.hcl` | `variables-healthcheck.tfvars` | `nrds_healthcheck_sm` | Auto-rerun failures (`health_check.yml`) |
-| prod | `backend-prod.hcl` | `variables-prod.tfvars` | `nrds_prod_sm` | Production deployment (`deploy_datastream.yml`) |
 
 ### Using an Environment
 
@@ -84,7 +83,6 @@ Each environment has isolated Terraform state to prevent conflicts:
 - **dev**: `ciroh-terraform-state` bucket (us-east-2)
 - **test**: `ciroh-ngen-datastream-test-tfstate` bucket
 - **healthcheck**: `ciroh-ngen-datastream-test-tfstate` bucket (separate key)
-- **prod**: `ciroh-ngen-datastream-prod-tfstate` bucket
 
 ### Adding a New Environment