core: remove dead event

Author: karalabe

core/events.go

@@ -38,9 +38,6 @@ type PendingLogsEvent struct {
 // PendingStateEvent is posted pre mining and notifies of pending state changes.
 type PendingStateEvent struct{}
 
-// NewBlockEvent is posted when a block has been imported.
-type NewBlockEvent struct{ Block *types.Block }
-
 // NewMinedBlockEvent is posted when a block has been imported.
 type NewMinedBlockEvent struct{ Block *types.Block }