Revert "update to use containerd seccomp package"

This reverts commit 4f8e065faf055d3f0463a92622297ca3afac07f4.

vendor/github.com/containerd/containerd/client_unix_test.go

@@ -1,38 +0,0 @@
-// +build !windows
-
-package containerd
-
-import (
-	"runtime"
-)
-
-const (
-	defaultRoot    = "/var/lib/containerd-test"
-	defaultState   = "/run/containerd-test"
-	defaultAddress = "/run/containerd-test/containerd.sock"
-)
-
-var (
-	testImage string
-)
-
-func platformTestSetup(client *Client) error {
-	return nil
-}
-
-func init() {
-	switch runtime.GOARCH {
-	case "386":
-		testImage = "docker.io/i386/alpine:latest"
-	case "arm":
-		testImage = "docker.io/arm32v6/alpine:latest"
-	case "arm64":
-		testImage = "docker.io/arm64v8/alpine:latest"
-	case "ppc64le":
-		testImage = "docker.io/ppc64le/alpine:latest"
-	case "s390x":
-		testImage = "docker.io/s390x/alpine:latest"
-	default:
-		testImage = "docker.io/library/alpine:latest"
-	}
-}