shimv2: Removing function as no longer used

Function removeNamespace is no longer used. Get rid of
it.

Signed-off-by: Archana Shinde <[email protected]>

containerd-shim-v2/utils.go

@@ -19,7 +19,6 @@ import (
 	vc "github.com/kata-containers/runtime/virtcontainers"
 	"github.com/kata-containers/runtime/virtcontainers/pkg/compatoci"
 	"github.com/kata-containers/runtime/virtcontainers/pkg/oci"
-	"github.com/opencontainers/runtime-spec/specs-go"
 	"github.com/sirupsen/logrus"
 )
 
@@ -124,12 +123,3 @@ func noNeedForOutput(detach bool, tty bool) bool {
 
 	return true
 }
-
-func removeNamespace(s *specs.Spec, nsType specs.LinuxNamespaceType) {
-	for i, n := range s.Linux.Namespaces {
-		if n.Type == nsType {
-			s.Linux.Namespaces = append(s.Linux.Namespaces[:i], s.Linux.Namespaces[i+1:]...)
-			return
-		}
-	}
-}