Add whitespace linter (#24855)

server/channels/app/platform/cluster_handlers.go

@@ -161,7 +161,6 @@ func (ps *PlatformService) InvalidateAllCaches() *model.AppError {
 	ps.InvalidateAllCachesSkipSend()
 
 	if ps.clusterIFace != nil {
-
 		msg := &model.ClusterMessage{
 			Event:            model.ClusterEventInvalidateAllCaches,
 			SendType:         model.ClusterSendReliable,