rm a redundant creation of goroutines

[husy-dev]

func (p *WorkerPool) dispatch() {
	for i := 0; i < p.maxWorkers; i++ {
		p.taskQueue[i] = make(chan func(), 1024)
		go startWorker(p.taskQueue[i])
	}
}

since function dispatch execute startWorker by goroutine, there is no need for startWorker to use goroutine inside.