remove Factor (unmaintained since 2016) (#797)

- ref: #757
- https://github.com/Rabenherz112/awesome-sysadmin-data/actions/runs/25768132137/job/75685569918
- Factor only has 3 releases, all of them done in 2015 or 2016, other then that there has been zero activity since 2016

README.md

@@ -192,7 +192,6 @@ _Related: [IT Asset Management](#it-asset-management)_
 - [Buildbot](https://buildbot.net/) - Python-based toolkit for continuous integration. ([Source Code](https://github.com/buildbot/buildbot)) `GPL-2.0` `Python`
 - [CDS](https://ovh.github.io/cds/) - Enterprise-Grade Continuous Delivery & DevOps Automation Open Source Platform. ([Source Code](https://github.com/ovh/cds)) `BSD-3-Clause` `Go`
 - [Concourse](https://concourse-ci.org/) - Concourse is a CI tool that treats pipelines as first class objects and containerizes every step along the way. ([Demo](https://ci.concourse-ci.org/), [Source Code](https://github.com/concourse/concourse)) `Apache-2.0` `Go`
-- [Factor](https://www.factor.io/) - Programmatically define and run workflows to connect configuration management, source code management, build, continuous integration, continuous deployment and communication tools. ([Source Code](https://github.com/factor-io/factor)) `MIT` `Ruby`
 - [GitLab CI](https://about.gitlab.com/solutions/continuous-integration/) - Gitlab's built-in, full-featured CI/CD solution. ([Source Code](https://gitlab.com/gitlab-org/gitlab-foss)) `MIT` `Ruby`
 - [GoCD](https://www.go.cd/) - Continuous delivery server. ([Source Code](https://github.com/gocd/gocd)) `Apache-2.0` `Java/Ruby`
 - [Harness](https://www.harness.io/open-source) - End-to-end developer platform with Source Control Management, CI/CD Pipelines, Hosted Developer Environments, and Artifact Registries (fork of Drone). ([Source Code](https://github.com/harness/harness)) `Apache-2.0` `Go`