fix：tags删除问题修复

Signed-off-by: mingsoft <killfen@126.com>

src/main/webapp/WEB-INF/manager/cms/content/form.ftl

@@ -493,6 +493,7 @@
                     var formData = that.form;
                     formData.contentType = ""
                     formData.contentImg = ""
+                    formData.contentTags = ""
                     ms.http.post(ms.manager + "/cms/content/delete.do",  [formData], {
                         headers: {
                             'Content-Type': 'application/json'