[shared] Merge knownSystems into systems attrSet

shared/base/modules/security/ssh.nix

@@ -3,13 +3,9 @@
   lib,
   systemConfig,
   systems,
-  knownSystems,
   common,
   ...
 }:
-let
-  allSystems = knownSystems // systems;
-in
 {
   programs.ssh.knownHosts = builtins.mapAttrs (hostName: system: {
     extraHostNames = [
@@ -21,8 +17,8 @@ in
       )
     ];
     publicKey = system.ssh.publicKey;
-  }) allSystems;
+  }) systems;
   users.users.${systemConfig.username}.openssh.authorizedKeys.keys = (
-    lib.mapAttrsToList (_hostName: system: system.ssh.publicKey) allSystems
+    lib.mapAttrsToList (_hostName: system: system.ssh.publicKey) systems
   );
 }