ephemeral: drop due to upstream archival (#398111)

Author: Scrumplex

doc/release-notes/rl-2505.section.md

@@ -57,6 +57,8 @@
 
 - The `electron` packages will now provide their headers (available via `electron.headers`) in extracted form instead of in a tarball.
 
+- The `ephemeral` package was removed due to upstream archival in early 2022.
+
 - [testers.shellcheck](https://nixos.org/manual/nixpkgs/unstable/#tester-shellcheck) now warns when `name` is not provided.
   The `name` argument will become mandatory in a future release.
 

pkgs/by-name/ep/ephemeral/package.nix

@@ -564,6 +564,7 @@ mapAliases {
   EmptyEpsilon = empty-epsilon; # Added 2024-07-14
   enyo-doom = enyo-launcher; # Added 2022-09-09
   epdfview = throw "'epdfview' has been removed due to lack of maintenance upstream. Consider using 'qpdfview' instead"; # Added 2024-10-19
+  ephemeral = throw "'ephemeral' has been archived upstream since 2022-04-02"; # added 2025-04-12
   epoxy = throw "'epoxy' has been renamed to/replaced by 'libepoxy'"; # Converted to throw 2024-10-17
 
   erlang_24 = throw "erlang_24 has been removed as it is unmaintained upstream";