[#xx] Avoid manual management of files in tests

Signed-off-by: Alejandro Lopez <a.lopez@yadro.com>

pkg/local_object_storage/engine/shards_test.go

@@ -1,7 +1,6 @@
 package engine
 
 import (
-	"os"
 	"testing"
 
 	"github.com/stretchr/testify/require"
@@ -14,7 +13,6 @@ func TestRemoveShard(t *testing.T) {
 	e, ids := te.engine, te.shardIDs
 	t.Cleanup(func() {
 		e.Close()
-		os.RemoveAll(t.Name())
 	})
 
 	require.Equal(t, numOfShards, len(e.shardPools))