Revert "kube-proxy: check KUBE-MARK-DROP"

This reverts commit 1ca0ffe.

kube-proxy is not recreating the rules associated to the
KUBE-MARK-DROP chain, that is created by the kubelet.

Is preferrable avoid the dependency between the kubelet and
kube-proxy and that each of them handle their own rules.

Author: aojea

pkg/proxy/iptables/proxier.go

@@ -842,7 +842,7 @@ func (proxier *Proxier) syncProxyRules() {
 			writeLine(proxier.filterChains, utiliptables.MakeChainLine(chainName))
 		}
 	}
-	for _, chainName := range []utiliptables.Chain{kubeServicesChain, kubeNodePortsChain, kubePostroutingChain, KubeMarkMasqChain, KubeMarkDropChain} {
+	for _, chainName := range []utiliptables.Chain{kubeServicesChain, kubeNodePortsChain, kubePostroutingChain, KubeMarkMasqChain} {
 		if chain, ok := existingNATChains[chainName]; ok {
 			writeBytesLine(proxier.natChains, chain)
 		} else {

pkg/proxy/iptables/proxier_test.go

@@ -2350,7 +2350,6 @@ COMMIT
 :KUBE-NODEPORTS - [0:0]
 :KUBE-POSTROUTING - [0:0]
 :KUBE-MARK-MASQ - [0:0]
-:KUBE-MARK-DROP - [0:0]
 :KUBE-SVC-AHZNAGK3SCETOS2T - [0:0]
 :KUBE-SEP-PXD6POUVGD2I37UY - [0:0]
 :KUBE-SEP-SOKZUIT7SCEVIP33 - [0:0]