core/state/snapshot: linter fixes

core/state/snapshot/journal.go

@@ -358,15 +358,14 @@ func iterateJournal(db ethdb.KeyValueReader, callback journalCallback) error {
 		}
 		parent = root
 	}
-	return nil
 }
 
 // CheckJournalStorage performs consistency-checks on the journalled
 // difflayers.
 func CheckJournalStorage(db ethdb.KeyValueStore) error {
 	// Load all the snapshot diffs from the journal
 	return iterateJournal(db, func(pRoot, root common.Hash, destructs map[common.Hash]struct{}, accounts map[common.Hash][]byte, storage map[common.Hash]map[common.Hash][]byte) error {
-		for accHash, _ := range storage {
+		for accHash := range storage {
 			if _, ok := accounts[accHash]; !ok {
 				log.Error("Dangling storage - missing account", "account", fmt.Sprintf("%#x", accHash), "root", root)
 			}