diff --git a/app/Builders/CourseChapterUser.php b/app/Builders/CourseChapterUser.php
deleted file mode 100644
index 618b50c0..00000000
--- a/app/Builders/CourseChapterUser.php
+++ /dev/null
@@ -1,82 +0,0 @@
-<?php
-
-namespace App\Builders;
-
-use App\Models\Course as CourseModel;
-
-class CourseChapterUser extends Builder
-{
-
-    /**
-     * 处理课时进度
-     *
-     * @param array $chapters
-     * @param array $studyHistory
-     * @return array
-     */
-    public function handleProcess($chapters, $studyHistory)
-    {
-        $status = [];
-
-        if ($studyHistory) {
-            foreach ($studyHistory as $value) {
-                $status[$value['chapter_id']] = [
-                    'duration' => $value['duration'],
-                    'finished' => $value['finished'],
-                ];
-            }
-        }
-
-        foreach ($chapters as $key => $chapter) {
-            if ($chapter['parent_id'] > 0) {
-                $me = [
-                    'duration' => $status[$chapter['id']]['duration'] ?? 0,
-                    'finished' => $status[$chapter['id']]['finished'] ?? 0,
-                ];
-                $chapters[$key]['me'] = $me;
-            }
-        }
-
-        return $chapters;
-    }
-
-    /**
-     * @param array $chapter
-     * @return array
-     */
-    protected function handleChapter($chapter)
-    {
-
-        $attrs = json_decode($chapter['attrs'], true);
-
-        $me = $chapter['me'] ?? new \stdClass();
-
-        $clickable = $chapter['published'];
-
-        if ($attrs['model'] == CourseModel::MODEL_VOD) {
-            unset($attrs['file_id'], $attrs['file_status']);
-        }
-
-        /**
-         * 直播前后半小时缓冲区间可用
-         */
-        if ($attrs['model'] == CourseModel::MODEL_LIVE) {
-            $caseA = $attrs['start_time'] - time() < 1800;
-            $caseB = time() - $attrs['end_time'] < 1800;
-            if ($caseA && $caseB) {
-                $clickable = 1;
-            }
-        }
-
-        return [
-            'id' => $chapter['id'],
-            'title' => $chapter['title'],
-            'summary' => $chapter['summary'],
-            'free' => $chapter['free'],
-            'clickable' => $clickable,
-            'attrs' => $attrs,
-            'me' => $me,
-        ];
-    }
-
-}