优化 (#3375)

app/src/main/res/values/strings.xml

@@ -1132,7 +1132,5 @@
     <string name="open_book_info_by_click_title">点击书名打开详情</string>
     <string name="export_wait">等待导出</string>
     <string name="default_home_page">默认主页</string>
-    <string name="use_lib_archive">Use LibArchive</string>
-    <string name="pref_use_lib_archive_summary">Using libarchive to extract files, it supports extracting RAR5.</string>
     <string name="show_bookshelf_fast_scroller">显示快速滚动条</string>
 </resources>