[fuchsia] cease generating user keys

Change-Id: Id49efbef174aeb55037a8b1d1bda841ed085a4ec
diff --git a/fuchsia/developer-keys/BUILD.gn b/fuchsia/developer-keys/BUILD.gn
index 93b19ff..f7b572f 100644
--- a/fuchsia/developer-keys/BUILD.gn
+++ b/fuchsia/developer-keys/BUILD.gn
@@ -18,55 +18,24 @@
     ":all",
   ]
 
-  resources = [
-    {
+  resources = []
+
+  if (extra_authorized_keys_file != "") {
+    resources += [{
       path = rebase_path("$root_out_dir/ssh-keys/authorized_keys")
       dest = "ssh/authorized_keys"
-    },
-  ]
+    }]
+  }
 }
 
 group("all") {
   public_deps = [
-    ":authorized_keys",
-    ":id_key",
     ":ssh_config",
   ]
 }
 
 keys_dir = "${root_build_dir}/ssh-keys"
 
-action("id_key") {
-  key_file = "${keys_dir}/id_ed25519"
-  script = "ssh-keygen-wrapper"
-  args = [
-    "ed25519",
-    rebase_path(key_file),
-  ]
-  outputs = [
-    key_file,
-    key_file + ".pub",
-  ]
-}
-
-action("authorized_keys") {
-  inputs = [
-    "${keys_dir}/id_ed25519.pub",
-  ]
-  if (extra_authorized_keys_file != "") {
-    inputs += [ extra_authorized_keys_file ]
-  }
-  outputs = [
-    "${keys_dir}/authorized_keys",
-  ]
-  deps = [
-    ":id_key",
-  ]
-
-  script = "concat_authorized_keys.sh"
-  args = rebase_path(outputs + inputs)
-}
-
 action("ssh_config") {
   config_file = "${keys_dir}/ssh_config"
   script = "generate_ssh_config.sh"