Revert "Fix data race on hcr.channels"

This reverts commit f45a150.

session/pingpong/hermes_channel_repository.go

@@ -454,25 +454,20 @@ func (hcr *HermesChannelRepository) updateChannelWithLatestPromise(chainID int64
 func (hcr *HermesChannelRepository) updateChannel(chainID int64, new HermesChannel) {
 	earningsOld := hcr.sumChannelsDetailed(chainID, new.Identity)
 
-	{
-		hcr.lock.Lock()
-		defer hcr.lock.Unlock()
-
-		updated := false
-
-		v := hcr.channels[chainID]
-		for i, channel := range v {
-			if channel.Identity == new.Identity && channel.HermesID == new.HermesID {
-				updated = true
-				hcr.channels[chainID][i] = new
-				break
-			}
-		}
-		res := append(hcr.channels[chainID], new)
-		if !updated {
-			hcr.channels[chainID] = res
+	updated := false
+
+	v := hcr.channels[chainID]
+	for i, channel := range v {
+		if channel.Identity == new.Identity && channel.HermesID == new.HermesID {
+			updated = true
+			hcr.channels[chainID][i] = new
+			break
 		}
 	}
+	res := append(hcr.channels[chainID], new)
+	if !updated {
+		hcr.channels[chainID] = res
+	}
 
 	log.Info().Msgf(
 		"Loaded state for provider %q, hermesID %q: balance %v, available balance %v, unsettled balance %v",