Remove stub for /api/v1/accounts/:id/identity_proofs (deprecated by Mastodon 3.5.0)

Signed-off-by: marcin mikołajczak <git@mkljczk.pl>

test/pleroma/web/mastodon_api/mastodon_api_controller_test.exs

@@ -6,15 +6,6 @@ defmodule Pleroma.Web.MastodonAPI.MastodonAPIControllerTest do
   use Pleroma.Web.ConnCase, async: true
 
   describe "empty_array/2 (stubs)" do
-    test "GET /api/v1/accounts/:id/identity_proofs" do
-      %{user: user, conn: conn} = oauth_access(["read:accounts"])
-
-      assert [] ==
-               conn
-               |> get("/api/v1/accounts/#{user.id}/identity_proofs")
-               |> json_response(200)
-    end
-
     test "GET /api/v1/endorsements" do
       %{conn: conn} = oauth_access(["read:accounts"])