pkg/emulation: remove slice copying

Copying the slice is not necessary here since registeredBinfmtMisc
always creates the slice from scratch.

This commit is part of series fixing issues reported by prealloc linter
from golangci-lint v2.8.0.

Signed-off-by: Kir Kolyshkin <kolyshkin@gmail.com>

pkg/emulation/emulation.go

@@ -7,12 +7,10 @@ import "github.com/sirupsen/logrus"
 // Registered returns a list of platforms for which we think we have user
 // space emulation available.
 func Registered() []string {
-	var registered []string
-	binfmt, err := registeredBinfmtMisc()
+	registered, err := registeredBinfmtMisc()
 	if err != nil {
 		logrus.Warnf("registeredBinfmtMisc(): %v", err)
 		return nil
 	}
-	registered = append(registered, binfmt...)
 	return registered
 }