Remove v1 runctypes

Signed-off-by: Maksym Pavlenko <pavlenko.maksym@gmail.com>

services/tasks/local_windows.go

@@ -18,7 +18,6 @@ package tasks
 
 import (
 	"github.com/containerd/containerd/plugin"
-	"github.com/containerd/containerd/runtime"
 )
 
 var tasksServiceRequires = []plugin.Type{
@@ -27,8 +26,3 @@ var tasksServiceRequires = []plugin.Type{
 	plugin.MetadataPlugin,
 	plugin.TaskMonitorPlugin,
 }
-
-// loadV1Runtimes on Windows V2 returns an empty map. There are no v1 runtimes
-func loadV1Runtimes(ic *plugin.InitContext) (map[string]runtime.PlatformRuntime, error) {
-	return make(map[string]runtime.PlatformRuntime), nil
-}