akkoma: remove all-packages.nix definition

pkgs/by-name/ak/akkoma/package.nix

@@ -1,6 +1,6 @@
 {
   lib,
-  beamPackages,
+  beam_minimal,
   fetchFromGitea,
   cmake,
   file,
@@ -8,6 +8,16 @@
   nix-update-script,
 }:
 
+let
+  beamPackages = beam_minimal.packages.erlang_26.extend (
+    self: super: {
+      elixir = self.elixir_1_16;
+      rebar3 = self.rebar3WithPlugins {
+        plugins = with self; [ pc ];
+      };
+    }
+  );
+in
 beamPackages.mixRelease rec {
   pname = "akkoma";
   version = "3.17.0";

pkgs/top-level/all-packages.nix

@@ -974,17 +974,6 @@ with pkgs;
 
   opnplug = adlplug.override { type = "OPN"; };
 
-  akkoma = callPackage ../by-name/ak/akkoma/package.nix {
-    beamPackages = beam_minimal.packages.erlang_26.extend (
-      self: super: {
-        elixir = self.elixir_1_16;
-        rebar3 = self.rebar3WithPlugins {
-          plugins = with self; [ pc ];
-        };
-      }
-    );
-  };
-
   akkoma-admin-fe = callPackage ../by-name/ak/akkoma-admin-fe/package.nix {
     python3 = python311;
   };