style(contact): 移除统一信用代码表单项的多余类名

src/views/saleManage/contact/components/addContactDialog.vue

@@ -53,7 +53,6 @@
               <el-form-item
                 label="统一信用代码	"
                 prop="unifiedSocialCreditCode"
-                class="form_item_label"
               >
                 <el-input
                   placeholder="请输入"