Remove Linux and Windows Kube-proxy Userspace mode

cmd/kube-proxy/app/server_test.go

@@ -120,7 +120,6 @@ metricsBindAddress: "%s"
 mode: "%s"
 oomScoreAdj: 17
 portRange: "2-7"
-udpIdleTimeout: 123ms
 detectLocalMode: "ClusterCIDR"
 detectLocal:
   bridgeInterface: "cbr0"
@@ -263,7 +262,6 @@ nodePortAddresses:
 			Mode:               kubeproxyconfig.ProxyMode(tc.mode),
 			OOMScoreAdj:        pointer.Int32(17),
 			PortRange:          "2-7",
-			UDPIdleTimeout:     metav1.Duration{Duration: 123 * time.Millisecond},
 			NodePortAddresses:  []string{"10.20.30.40/16", "fd00:1::0/64"},
 			DetectLocalMode:    kubeproxyconfig.LocalModeClusterCIDR,
 			DetectLocal: kubeproxyconfig.DetectLocalConfiguration{
@@ -457,8 +455,7 @@ mode: ""
 nodePortAddresses: null
 oomScoreAdj: -999
 portRange: ""
-detectLocalMode: "BridgeInterface"
-udpIdleTimeout: 250ms`)
+detectLocalMode: "BridgeInterface"`)
 		if err != nil {
 			return nil, "", fmt.Errorf("unexpected error when writing content to temp kube-proxy config file: %v", err)
 		}