fix 下载试卷时不提示保存成功或失败

src/features/OfflineExam/OfflineExamList.vue

@@ -96,17 +96,18 @@ async function toDownloadPaper(course: OfflineExam) {
     act: "下载试卷",
   });
   downloading = true;
-  const result = await downloadBlobByApi(() => {
+  await downloadBlobByApi(() => {
     return exportOfflinePaperApi(course.paperId);
   }).catch(() => false);
 
   downloading = false;
 
-  if (result) {
-    $message.success("下载成功！");
-  } else {
-    $message.error("下载失败，请重新尝试！");
-  }
+  // 由于无法知晓用户是否取消保存，所以此时无法做相应的提示
+  // if (result) {
+  //   $message.success("下载成功！");
+  // } else {
+  //   $message.error("下载失败，请重新尝试！");
+  // }
 }
 
 function toUploadPaper(course: OfflineExam) {