优化

app/src/main/java/io/legado/app/help/book/BookHelp.kt

@@ -302,9 +302,6 @@ object BookHelp {
      * 读取章节内容
      */
     fun getContent(book: Book, bookChapter: BookChapter): String? {
-        if (book.isLocalTxt) {
-            return LocalBook.getContent(book, bookChapter)
-        }
         val file = downloadDir.getFile(
             cacheFolderName,
             book.getFolderName(),