relay: get rid of the message queue, because js is single-threaded.

utils.ts

@@ -123,62 +123,3 @@ export function mergeReverseSortedLists(list1: NostrEvent[], list2: NostrEvent[]
 
   return result
 }
-
-export class QueueNode<V> {
-  public value: V
-  public next: QueueNode<V> | null = null
-  public prev: QueueNode<V> | null = null
-
-  constructor(message: V) {
-    this.value = message
-  }
-}
-
-export class Queue<V> {
-  public first: QueueNode<V> | null
-  public last: QueueNode<V> | null
-
-  constructor() {
-    this.first = null
-    this.last = null
-  }
-
-  enqueue(value: V): boolean {
-    const newNode = new QueueNode(value)
-    if (!this.last) {
-      // list is empty
-      this.first = newNode
-      this.last = newNode
-    } else if (this.last === this.first) {
-      // list has a single element
-      this.last = newNode
-      this.last.prev = this.first
-      this.first.next = newNode
-    } else {
-      // list has elements, add as last
-      newNode.prev = this.last
-      this.last.next = newNode
-      this.last = newNode
-    }
-    return true
-  }
-
-  dequeue(): V | null {
-    if (!this.first) return null
-
-    if (this.first === this.last) {
-      const target = this.first
-      this.first = null
-      this.last = null
-      return target.value
-    }
-
-    const target = this.first
-    this.first = target.next
-    if (this.first) {
-      this.first.prev = null // fix: clean up prev pointer
-    }
-
-    return target.value
-  }
-}