remove EventReceiver - not used anymore

cluster.go

@@ -231,9 +231,6 @@ type Cluster struct {
 	// Maximum number of Set() or Clear() commands per request.
 	MaxWritesPerRequest int
 
-	// EventReceiver receives NodeEvents pertaining to node membership.
-	EventReceiver EventReceiver
-
 	// Data directory path.
 	Path     string
 	Topology *Topology
@@ -268,10 +265,9 @@ type Cluster struct {
 // NewCluster returns a new instance of Cluster with defaults.
 func NewCluster() *Cluster {
 	return &Cluster{
-		Hasher:        &jmphasher{},
-		PartitionN:    DefaultPartitionN,
-		ReplicaN:      1,
-		EventReceiver: NopEventReceiver,
+		Hasher:     &jmphasher{},
+		PartitionN: DefaultPartitionN,
+		ReplicaN:   1,
 
 		joiningLeavingNodes: make(chan nodeAction, 10), // buffered channel
 		jobs:                make(map[int64]*resizeJob),

event.go

@@ -35,21 +35,3 @@ type NodeEvent struct {
 type EventHandler interface {
 	ReceiveEvent(e *NodeEvent) error
 }
-
-// EventReceiver is the interface for the object which will listen for and
-// decode broadcast messages before passing them to pilosa to handle. The
-// implementation of this could be an http server which listens for messages,
-// gets the protobuf payload, and then passes it to
-// EventHandler.ReceiveMessage.
-type EventReceiver interface {
-	// Start starts listening for broadcast messages - it should return
-	// immediately, spawning a goroutine if necessary.
-	Start(EventHandler) error
-}
-
-type nopEventReceiver struct{}
-
-func (n *nopEventReceiver) Start(e EventHandler) error { return nil }
-
-// NopEventReceiver is a no-op implementation of the EventReceiver.
-var NopEventReceiver = &nopEventReceiver{}