fix: 修复不小心选择业务库后想删掉的问题 (#2042)

Author: hzbnb

web/src/view/systemTools/autoCode/index.vue

@@ -307,6 +307,7 @@
               </template>
               <el-select
                 v-model="form.businessDB"
+                clearable
                 placeholder="选择业务库"
                 class="w-full"
               >