Remove the Photos start-stop test.

Based on the information that the application has been removed
from the standard Workstation installation, see
https://pagure.io/fedora-comps/c/462b65876fb4258fdb2ce19f4193900ef2bdc2d9?branch=main,
we remove that application from this suite.

tests/apps_startstop/gnome/photos.pm

@@ -1,27 +0,0 @@
-use base "installedtest";
-use strict;
-use testapi;
-use utils;
-
-# This test checks that Photos starts.
-
-sub run {
-    my $self = shift;
-
-    # Start the application
-    start_with_launcher('apps_menu_photos');
-    # Check that is started
-    assert_screen 'apps_run_photos';
-    # Register application
-    register_application("gnome-photos");
-    # Close the application
-    quit_with_shortcut();
-}
-
-sub test_flags {
-    return {always_rollback => 1};
-}
-
-1;
-
-# vim: set sw=4 et: