Drop EnsureUserPublicKey plug

It is not needed since fetch_public_keys will already
initiate remote lookup if necessary

lib/pleroma/web/plugs/ensure_user_public_key_plug.ex

@@ -1,32 +0,0 @@
-defmodule Pleroma.Web.Plugs.EnsureUserPublicKeyPlug do
-  @moduledoc """
-  This plug will attempt to pull in a user's public key if we do not have it.
-  We _should_ be able to request the URL from the key URL...
-  """
-
-  alias Pleroma.User
-
-  def init(options), do: options
-
-  def call(conn, _opts) do
-    key_id = key_id_from_conn(conn)
-
-    unless is_nil(key_id) do
-      User.SigningKey.get_or_fetch_by_key_id(key_id)
-      # now we SHOULD have the user that owns the key locally. maybe.
-      # if we don't, we'll error out when we try to validate.
-    end
-
-    conn
-  end
-
-  defp key_id_from_conn(conn) do
-    case HTTPSignatures.signature_for_conn(conn) do
-      %{"keyId" => key_id} when is_binary(key_id) ->
-        key_id
-
-      _ ->
-        nil
-    end
-  end
-end

lib/pleroma/web/router.ex

@@ -146,13 +146,11 @@ defmodule Pleroma.Web.Router do
   end
 
   pipeline :optional_http_signature do
-    plug(Pleroma.Web.Plugs.EnsureUserPublicKeyPlug)
     plug(Pleroma.Web.Plugs.HTTPSignaturePlug)
     plug(Pleroma.Web.Plugs.MappedSignatureToIdentityPlug)
   end
 
   pipeline :http_signature do
-    plug(Pleroma.Web.Plugs.EnsureUserPublicKeyPlug)
     plug(Pleroma.Web.Plugs.HTTPSignaturePlug)
     plug(Pleroma.Web.Plugs.MappedSignatureToIdentityPlug)
     plug(Pleroma.Web.Plugs.EnsureHTTPSignaturePlug)