Drop staff restriction in beta and staging

because it was preventing testing of signups.

test/controllers/non_production_remote_access_test.rb

@@ -1,34 +0,0 @@
-require "test_helper"
-
-class NonProductionRemoteAccessTest < ActionDispatch::IntegrationTest
-  test "staff can access in staging environment" do
-    sign_in_as :david
-
-    Rails.stubs(:env).returns(ActiveSupport::EnvironmentInquirer.new("staging"))
-    get cards_path
-    assert_response :success
-  end
-
-  test "non-staff cannot access in staging environment" do
-    sign_in_as :jz
-
-    Rails.stubs(:env).returns(ActiveSupport::EnvironmentInquirer.new("staging"))
-    get cards_path
-    assert_response :forbidden
-  end
-
-  test "non-staff can access in production environment" do
-    sign_in_as :jz
-
-    Rails.stubs(:env).returns(ActiveSupport::EnvironmentInquirer.new("production"))
-    get cards_path
-    assert_response :success
-  end
-
-  test "non-staff can access in local environment" do
-    sign_in_as :jz
-
-    get cards_path
-    assert_response :success
-  end
-end