微信端不是签名回调时删除签名信息

src/views/ebiz/questions/QuestionsDetail.vue

@@ -528,6 +528,9 @@ export default {
             localStorage.setItem('insurantSignInfo', imgBase64Data)
           }
         }
+      } else {
+        localStorage.removeItem('insurantSignInfo')
+        localStorage.removeItem('policyholderSignInfo')
       }
 
       // localstorage存在投保人签名信息