misc: fixed lint warnings

block/block_index_recovery.go

@@ -21,7 +21,7 @@ func (bm *Manager) RecoverIndexFromPackFile(ctx context.Context, packFile string
 	if err != nil {
 		return nil, fmt.Errorf("unable to open index in file %v", packFile)
 	}
-	defer ndx.Close()
+	defer ndx.Close() //nolint:errcheck
 
 	var recovered []Info
 

storage/filesystem/filesystem_storage.go

@@ -50,7 +50,7 @@ func (fs *fsStorage) GetBlock(ctx context.Context, blockID string, offset, lengt
 		return ioutil.ReadAll(f)
 	}
 
-	if _, err := f.Seek(offset, io.SeekStart); err != nil {
+	if _, err = f.Seek(offset, io.SeekStart); err != nil {
 		return nil, err
 	}
 	b, err := ioutil.ReadAll(io.LimitReader(f, length))

storage/gcs/gcs_storage.go

@@ -72,10 +72,7 @@ func exponentialBackoff(desc string, att retry.AttemptFunc) (interface{}, error)
 
 func isRetriableError(err error) bool {
 	if apiError, ok := err.(*googleapi.Error); ok {
-		if apiError.Code >= 500 {
-			return true
-		}
-		return false
+		return apiError.Code >= 500
 	}
 
 	switch err {