Remove v1 runctypes

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

integration/client/container_test.go

@@ -39,7 +39,6 @@ import (
 	"github.com/containerd/containerd/namespaces"
 	"github.com/containerd/containerd/oci"
 	"github.com/containerd/containerd/platforms"
-	"github.com/containerd/containerd/plugin"
 	gogotypes "github.com/containerd/containerd/protobuf/types"
 	_ "github.com/containerd/containerd/runtime"
 	"github.com/containerd/containerd/runtime/v2/runc/options"
@@ -670,10 +669,6 @@ func TestKillContainerDeletedByRunc(t *testing.T) {
 	}
 	defer client.Close()
 
-	if client.Runtime() == plugin.RuntimeLinuxV1 {
-		t.Skip("test relies on runtime v2")
-	}
-
 	var (
 		image       Image
 		ctx, cancel = testContext(t)