diff --git a/hub/hub.go b/hub/hub.go
index e418d48..e666c3f 100644
--- a/hub/hub.go
+++ b/hub/hub.go
@@ -163,11 +163,6 @@ func (h *Hub) SendDraw(ctx context.Context, options *DrawOptions) {
 	send(ctx, h.DrawCh(), NewPayload(options, isBatchCtx(ctx)))
 }
 
-// SendPurgeDisplayCache sends a request to purge the display cache
-func (h *Hub) SendPurgeDisplayCache(ctx context.Context) {
-	send(ctx, h.DrawCh(), NewPayload(&DrawOptions{PurgeCache: true}, isBatchCtx(ctx)))
-}
-
 // StatusMsgCh returns the channel to update the status message
 func (h *Hub) StatusMsgCh() chan *Payload[StatusMsg] {
 	return h.statusMsgCh
diff --git a/interface.go b/interface.go
index 39972dd..cd49080 100644
--- a/interface.go
+++ b/interface.go
@@ -468,11 +468,10 @@ type Buffer interface {
 
 // MemoryBuffer is an implementation of Buffer
 type MemoryBuffer struct {
-	done         chan struct{}
-	doneOnce     sync.Once
-	lines        []line.Line
-	mutex        sync.RWMutex
-	PeriodicFunc func()
+	done     chan struct{}
+	doneOnce sync.Once
+	lines    []line.Line
+	mutex    sync.RWMutex
 }
 
 type ActionMap interface {
diff --git a/pipeline/pipeline.go b/pipeline/pipeline.go
index c6cfa29..1307dd2 100644
--- a/pipeline/pipeline.go
+++ b/pipeline/pipeline.go
@@ -22,24 +22,6 @@ func QueryFromContext(ctx context.Context) string {
 	return v
 }
 
-func NilOutput(ctx context.Context) ChanOutput {
-	ch := make(chan line.Line)
-	go func() {
-		for {
-			select {
-			case <-ctx.Done():
-				return
-			case _, ok := <-ch:
-				if !ok {
-					return
-				}
-			}
-		}
-	}()
-
-	return ChanOutput(ch)
-}
-
 // OutCh returns the channel that acceptors can listen to
 func (oc ChanOutput) OutCh() <-chan line.Line {
 	return oc
diff --git a/state.go b/state.go
index 2f93d3b..9120205 100644
--- a/state.go
+++ b/state.go
@@ -20,11 +20,6 @@ func (s *SingleKeyJumpState) Mode() bool {
 	return s.mode
 }
 
-// SetMode sets single-key jump mode on or off.
-func (s *SingleKeyJumpState) SetMode(b bool) {
-	s.mode = b
-}
-
 // ShowPrefix returns whether jump prefixes should be displayed.
 func (s *SingleKeyJumpState) ShowPrefix() bool {
 	return s.showPrefix