Remove Amanda (Unmaintained since May 2023) (#612)

Author: Ki-er

README.md

@@ -86,7 +86,6 @@ Build automation.
 
 _See also: [Restic's list of Linux backup software](https://github.com/restic/others)_
 
-- [Amanda](https://www.amanda.org/) - Backup and archive many computers on a network to disk, tape changer/drive or cloud storage. ([Source Code](https://github.com/zmanda/amanda)) `MIT` `C`
 - [Backupninja](https://0xacab.org/liberate/backupninja) - Lightweight, extensible meta-backup system, provides a centralized way to configure and coordinate many different backup utilities. `GPL-2.0` `Shell`
 - [Backrest](https://garethgeorge.github.io/backrest/) - Backrest is a web UI and orchestrator for restic backup. ([Source Code](https://github.com/garethgeorge/backrest)) `GPL-3.0` `Docker/Go`
 - [Bareos](https://www.bareos.org/) - Cross-network backup solution which preserves, archives, and recovers data from all major operating systems. ([Source Code](https://github.com/bareos/bareos)) `AGPL-3.0` `C++/C`