Merge pull request #27699 from yongtang/27695-info-duplicate-nat-null-plugin

Remove duplicate `nat`, `null` in `docker info` for Windows
Upstream-commit: f901c5ed1c76d507a09079935e680f8c5bdd9070
Component: engine

components/engine/daemon/network.go

@@ -364,6 +364,9 @@ func (daemon *Daemon) GetNetworkDriverList() []string {
 
 	pluginList := daemon.netController.BuiltinDrivers()
 	pluginMap := make(map[string]bool)
+	for _, plugin := range pluginList {
+		pluginMap[plugin] = true
+	}
 
 	networks := daemon.netController.Networks()