trie, les: add missing calls to Ticker.Stop (ethereum#23415)

les/pruner.go

@@ -62,6 +62,7 @@ func (p *pruner) loop() {
 
 	// cleanTicker is the ticker used to trigger a history clean 2 times a day.
 	var cleanTicker = time.NewTicker(12 * time.Hour)
+	defer cleanTicker.Stop()
 
 	// pruning finds the sections that have been processed by all indexers
 	// and deletes all historical chain data.

trie/sync_bloom.go

@@ -129,6 +129,8 @@ func (b *SyncBloom) init(database ethdb.Iteratee) {
 func (b *SyncBloom) meter() {
 	// check every second
 	tick := time.NewTicker(1 * time.Second)
+	defer tick.Stop()
+
 	for {
 		select {
 		case <-tick.C: