Remove a duplicate function

Author: joshk

lib/nerves_hub/devices.ex

@@ -101,19 +101,6 @@ defmodule NervesHub.Devices do
     |> Repo.one!()
   end
 
-  def get_device_by_x509(cert) do
-    fingerprint = NervesHub.Certificate.fingerprint(cert)
-
-    Device
-    |> join(:inner, [d], dc in assoc(d, :device_certificates))
-    |> where([d, dc], dc.fingerprint == ^fingerprint)
-    |> Repo.one()
-    |> case do
-      nil -> {:error, :not_found}
-      certificate -> {:ok, certificate}
-    end
-  end
-
   @spec filter(Product.t(), map()) :: %{
           entries: list(Device.t()),
           current_page: non_neg_integer(),