Don't need resource pool anymore.

src/resource-pool.js

@@ -1,57 +0,0 @@
-/** @babel */
-
-// Manages a pool of some resource.
-export default class ResourcePool {
-  constructor (pool) {
-    this.pool = pool
-
-    this.queue = []
-  }
-
-  // Enqueue the given function. The function will be given an object from the
-  // pool. The function must return a {Promise}.
-  enqueue (fn) {
-    let resolve = null
-    let reject = null
-    const wrapperPromise = new Promise((resolve_, reject_) => {
-      resolve = resolve_
-      reject = reject_
-    })
-
-    this.queue.push(this.wrapFunction(fn, resolve, reject))
-
-    this.dequeueIfAble()
-
-    return wrapperPromise
-  }
-
-  wrapFunction (fn, resolve, reject) {
-    return (resource) => {
-      const promise = fn(resource)
-      promise
-        .then(result => {
-          resolve(result)
-          this.taskDidComplete(resource)
-        }, error => {
-          reject(error)
-          this.taskDidComplete(resource)
-        })
-    }
-  }
-
-  taskDidComplete (resource) {
-    this.pool.push(resource)
-
-    this.dequeueIfAble()
-  }
-
-  dequeueIfAble () {
-    if (!this.pool.length || !this.queue.length) return
-
-    const fn = this.queue.shift()
-    const resource = this.pool.shift()
-    fn(resource)
-  }
-
-  getQueueDepth () { return this.queue.length }
-}