Clean up licensing information in migration guide

Removed licensing information and notices from the migration guide.

Author: mgarciaLKS

migration-guides/GENERIC_POSTGRESQL_MIGRATION_GUIDE.md

@@ -48,15 +48,6 @@ Set these variables according to your deployment **before starting**:
 export NAMESPACE="your-namespace"                    # e.g., "production", "staging"
 export RELEASE_NAME="your-release"                   # e.g., "my-app", "backend-service"
 export POSTGRES_POD="${RELEASE_NAME}-postgresql-0"   # StatefulSet pod name
-
-## NOTICE
-
-This work is licensed under the [CC-BY-4.0](https://creativecommons.org/licenses/by/4.0/legalcode).
-
-- SPDX-License-Identifier: CC-BY-4.0
-- SPDX-FileCopyrightText: 2026 Contributors to the Eclipse Foundation
-- SPDX-FileCopyrightText: 2026 Catena-X Automotive Network e.V.
-- SPDX-FileCopyrightText: 2026 LKS Next
 export PG_USER="postgres"                            # PostgreSQL admin user
 export PG_DATABASE="your-database"                   # Main database name
 export SECRET_NAME="your-postgres-secret"            # Secret containing passwords
@@ -521,5 +512,6 @@ postgresql:  # Note: uses alias in Chart.yaml
 This work is licensed under the [CC-BY-4.0](https://creativecommons.org/licenses/by/4.0/legalcode).
 
 - SPDX-License-Identifier: CC-BY-4.0
-- SPDX-FileCopyrightText: 2025, 2026 Contributors to the Eclipse Foundation
-- Source URL: https://github.com/eclipse-tractusx
+- SPDX-FileCopyrightText: 2026 Contributors to the Eclipse Foundation
+- SPDX-FileCopyrightText: 2026 Catena-X Automotive Network e.V.
+- SPDX-FileCopyrightText: 2026 LKS Next