core/rawdb: remove unused math (#21065)

ucwong · web-flow · commit 7540c53e72f2 · 2020-05-12T12:19:15.000+03:00
diff --git a/core/rawdb/chain_iterator.go b/core/rawdb/chain_iterator.go
@@ -17,7 +17,6 @@
 package rawdb
 
 import (
-	"math"
 	"runtime"
 	"sync/atomic"
 	"time"
