[#1494] *: Fix linter warnings

Signed-off-by: Evgenii Stratonikov <evgeniy@nspcc.ru>

cmd/neofs-node/cache.go

@@ -82,10 +82,6 @@ func (c *ttlNetCache) remove(key interface{}) {
 	c.cache.Remove(key)
 }
 
-func (c *ttlNetCache) keys() []interface{} {
-	return c.cache.Keys()
-}
-
 // entity that provides LRU cache interface.
 type lruNetCache struct {
 	cache *lru.Cache

cmd/neofs-node/object.go

@@ -404,17 +404,6 @@ type morphEACLFetcher struct {
 	w *cntClient.Client
 }
 
-type signedEACLTable eaclSDK.Table
-
-func (s *signedEACLTable) ReadSignedData(_ []byte) ([]byte, error) {
-	return (*eaclSDK.Table)(s).Marshal()
-}
-
-func (s *signedEACLTable) SignedDataSize() int {
-	// TODO: #1147 add eacl.Table.Size method
-	return (*eaclSDK.Table)(s).ToV2().StableSize()
-}
-
 func (s *morphEACLFetcher) GetEACL(cnr cid.ID) (*eaclSDK.Table, error) {
 	table, err := s.w.GetEACL(cnr)
 	if err != nil {

pkg/local_object_storage/engine/select.go

@@ -70,12 +70,12 @@ func (e *StorageEngine) _select(prm SelectPrm) (SelectRes, error) {
 		if err != nil {
 			e.reportShardError(sh, "could not select objects from shard", err)
 			return false
-		} else {
-			for _, addr := range res.AddressList() { // save only unique values
-				if _, ok := uniqueMap[addr.EncodeToString()]; !ok {
-					uniqueMap[addr.EncodeToString()] = struct{}{}
-					addrList = append(addrList, addr)
-				}
+		}
+
+		for _, addr := range res.AddressList() { // save only unique values
+			if _, ok := uniqueMap[addr.EncodeToString()]; !ok {
+				uniqueMap[addr.EncodeToString()] = struct{}{}
+				addrList = append(addrList, addr)
 			}
 		}
 

pkg/morph/client/audit/put_result.go

@@ -1,7 +1,6 @@
 package audit
 
 import (
-	"errors"
 	"fmt"
 
 	"github.com/nspcc-dev/neofs-node/pkg/morph/client"
@@ -11,8 +10,6 @@ import (
 // ResultID is an identity of audit result inside audit contract.
 type ResultID []byte
 
-var errUnsupported = errors.New("unsupported structure version")
-
 // PutPrm groups parameters of PutAuditResult operation.
 type PutPrm struct {
 	result *auditAPI.Result

pkg/morph/client/container/client.go

@@ -42,7 +42,6 @@ const (
 
 var (
 	errNilArgument = errors.New("empty argument")
-	errUnsupported = errors.New("unsupported structure version")
 )
 
 // NewFromMorph returns the wrapper instance from the raw morph client.