Remove incorrect desktop_update_graphical needle for KDE

The previous commit is the correct fix for the problem here.
Adding a needle that matches on the tray icon was not correct,
we need to be sure that we can access the Updates view from
within Discover itself.

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

needles/kde/desktop_package_tool_update-kde-noupdates-20220615.json

@@ -1,16 +0,0 @@
-{
-  "area": [
-    {
-      "xpos": 760,
-      "height": 18,
-      "width": 19,
-      "type": "match",
-      "ypos": 737
-    }
-  ],
-  "properties": [],
-  "tags": [
-    "DESKTOP-kde",
-    "desktop_package_tool_update"
-  ]
-}