去掉：上传取消按钮

src/components/education/custom-resource/edit-course-dialog.vue

@@ -146,7 +146,7 @@
                     <div style="flex:1;width: 358px;">
                       <span  class="upload-process" :style="{'width': (uploadProgress/100 * 300) + 'px'}"></span>
                     </div>
-                    <img @click="cancleUpload" style="widht:16px;height:16px;margin-top:3px;margin-left:8px;" src="../../../assets/image/phrase3/close.png" />
+                    <!-- <img @click="cancleUpload" style="widht:16px;height:16px;margin-top:3px;margin-left:8px;" src="../../../assets/image/phrase3/close.png" /> -->
                   </div>
                 </div>
               </el-upload>