Drop KDE app 'netcon' test

This was originally a test of nm-connection-editor. However,
at some point that app stopped shipping a .desktop file by
default (it's in a subpackage that is not included in a default
KDE install) and the needle got updated to match on what the
same string now launched, which is a random part of the KDE
system settings. But there's no real sense in this - we don't
test launching every other pane of the system settings app from
the launcher, so it doesn't make sense to just test one random
one like this. Let's just throw the test out.

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

needles/kde/apps/netcon_runs-noto-20210408.json

@@ -1,15 +0,0 @@
-{
-  "area": [
-    {
-      "type": "match",
-      "height": 17,
-      "xpos": 362,
-      "width": 80,
-      "ypos": 7
-    }
-  ],
-  "properties": [],
-  "tags": [
-    "netcon_runs"
-  ]
-}

tests/apps_startstop/kde/netcon.pm

@@ -1,26 +0,0 @@
-use base "installedtest";
-use strict;
-use testapi;
-use utils;
-
-# This test checks that Network connections starts.
-
-sub run {
-    my $self = shift;
-    
-    # Start the application
-    menu_launch_type 'network configuration';
-    # Check that it is started
-    assert_screen 'netcon_runs';
-    # Close the application
-    quit_with_shortcut();
-}
-
-sub test_flags {
-    return {always_rollback => 1};
-}
-
-
-1;
-
-# vim: set sw=4 et: