diff --git a/hwe/queue.php b/hwe/queue.php
deleted file mode 100644
index 210bc0f8..00000000
--- a/hwe/queue.php
+++ /dev/null
@@ -1,43 +0,0 @@
-<?php
-namespace sammo;
-
-//TODO: 참조 값을 SplQueue ( https://secure.php.net/manual/en/class.splqueue.php )를 이용하도록 변경
-class Queue {
-    private $capacity;
-    private $size;
-    private $head;
-    private $tail;
-    private $arr;
-
-    function Queue($capacity) {
-        $this->capacity = $capacity;
-        $this->size = 0;
-        $this->head = 0;
-        $this->tail = 0;
-    }
-
-    function getSize() {
-        return $this->size;
-    }
-
-    function clear() {
-        $this->size = 0;
-        $this->head = 0;
-        $this->tail = 0;
-    }
-
-    function push($value) {
-        if($this->size >= $this->capacity) return;
-        $this->arr[$this->tail] = $value;
-        $this->tail = ($this->tail + 1) % $this->capacity;
-        $this->size++;
-    }
-
-    function pop() {
-        if($this->size <= 0) return null;
-        $value = $this->arr[$this->head];
-        $this->head = ($this->head + 1) % $this->capacity;
-        $this->size--;
-        return $value;
-    }
-}