The ideal option would be if you could create a “Deleted” playlist, add albums there and delete them from the HDD. But unfortunately, after deletion they disappear from the playlist
[It's odd that I've had to explain this about half a dozen times over the past month or so.]
A playlist is nothing more than a text file. It only contains the path to the music file referenced. It does not contain any music files. It is text only.
When you delete the music file, the playlist updates by removing the path (text) pointing to that file.