考生日志管理移除批次清除按钮

src/features/invigilation/StudentLogManage/StudentLogManage.vue

@@ -12,7 +12,6 @@
               v-model="filter.examId"
               placeholder="请选择批次"
               @change="examChange"
-              clearable
             >
               <el-option
                 v-for="item in examBatchs"