Remove obsolete Uptime Kuma installation script #760

Goal\nRemove the Uptime Kuma installation script from the repository because it is no longer part of the supported monitoring setup.\n\n## Requirements\n- Remove the obsolete installation script and any dedicated supporting files that are no longer needed.\n- Search for and update or remove references in documentation, workflows, deployment scripts, and README files.\n- Confirm no supported build, deployment, or operational workflow depends on the script.\n- Verify the repository remains buildable and relevant automation still passes.