linux: Remove unused code in test suite

There's no need to create a udev device, the metadata comes from bluez.

src/linux/integration-test

@@ -1566,7 +1566,7 @@ class Tests(dbusmock.DBusTestCase):
                                       None,
                                       [], [])
 
-        # Add a device to both bluez and udev
+        # Add a device to bluez
         address = '11:22:33:44:55:66'
         alias = 'Arc Touch Mouse SE'
 
@@ -1580,13 +1580,6 @@ class Tests(dbusmock.DBusTestCase):
         }
         device.AddProperties(BATTERY_IFACE, properties)
 
-        parent = dev
-        self.testbed.add_device(
-            'input',
-            'input3/event4',
-            parent,
-            [], ['DEVNAME', 'input/event4', 'ID_INPUT_MOUSE', '1'])
-
         self.start_daemon()
 
         # process = subprocess.Popen(['gdbus', 'introspect', '--system', '--dest', 'org.bluez', '--object-path', '/org/bluez/hci0/dev_11_22_33_44_55_66'])