vendor: sirupsen/logrus -> Sirupsen/logrus

github.com/docker/docker/pkg/archive requires Sirupsen/logrus.
So let's remove sirupsen/logrus at the moment.

Signed-off-by: Akihiro Suda <suda.akihiro@lab.ntt.co.jp>

execution/executors/shim/process.go

@@ -14,7 +14,7 @@ import (
 	"github.com/docker/containerd/execution"
 	"github.com/docker/containerd/log"
 	"github.com/pkg/errors"
-	"github.com/sirupsen/logrus"
+	"github.com/Sirupsen/logrus"
 	"golang.org/x/sys/unix"
 
 	runc "github.com/crosbymichael/go-runc"

execution/executors/shim/shim.go

@@ -15,7 +15,7 @@ import (
 	"github.com/docker/containerd/log"
 	"github.com/opencontainers/runtime-spec/specs-go"
 	"github.com/pkg/errors"
-	"github.com/sirupsen/logrus"
+	"github.com/Sirupsen/logrus"
 )
 
 const (