refactor: derive host name solely from host directory name

hosts/eetion-02/default.nix

@@ -11,13 +11,6 @@
     ../../modules/ssh
   ];
 
-  ssh = {
-    authorizedHosts = [
-      "andromache"
-      "astyanax"
-    ];
-  };
-
   boot = {
     kernelParams = [
       "console=ttyS1,115200n8"

hosts/eetion-02/host.nix

@@ -1,6 +1,5 @@
 {
   host = {
     username = "h";
-    name = "eetion-02";
   };
 }