remove old code

weed/mq/topic.go

@@ -0,0 +1,23 @@
+package mq
+
+import "time"
+
+type Namespace string
+
+type Topic struct {
+	namespace Namespace
+	name      string
+}
+
+type Partition struct {
+	rangeStart int
+	rangeStop  int // exclusive
+	ringSize   int
+}
+
+type Segment struct {
+	topic        Topic
+	id           int32
+	partition    Partition
+	lastModified time.Time
+}