fix: 保持 dtx 释放的文件与提示信息一致

njuthesis.dtx

@@ -193,7 +193,6 @@ through XeTeX.
 \Msg{*     njuthesis.cls                                         *}
 \Msg{*     njuthesis.ins                                         *}
 \Msg{*     README.md                                             *}
-\Msg{*     README_EN.md                                          *}
 \Msg{*                                                           *}
 \Msg{* To produce the documentation, run the file njuthesis.dtx  *}
 \Msg{* through XeLaTeX.                                          *}