gnome-text-editor: don't check 'System' tab in About

In 43-alpha it's gone, the replacement is Troubleshooting ->
Debugging Information. But it would be a pain to write two
forks in the code for handling both cases, and there's a ton
more stuff in the new-style About dialog that we're not
checking either. I don't think we really need to click on all
of it, and this bit of it isn't super important. So on the
whole I'd rather just keep things simple and drop this check.

Signed-off-by: Adam Williamson <awilliam@redhat.com>

tests/applications/gnome-text-editor/about.pm

@@ -24,13 +24,6 @@ sub run {
 
     # Check that Credits were shown.
     assert_screen "gte_credits_shown";
-
-    # Check the System tab
-    # This doesn't show up on Silverblue yet, it's on an older version
-    unless (get_var("CANNED")) {
-        assert_and_click "gte_system_tab";
-        assert_screen "gte_system_shown";
-    }
 }
 
 sub test_flags {