[bugfix] remove unnecessary props (#323)

* fix: Tabbar icon line-height

* [new feature] progress add showPivot prop

* [new feature] TabItem support vue-router

* [new feature] update document header style

* [Doc] add toast english ducoment

* [bugfix] Search box-sizing wrong

* [Doc] update vant-demo respo

* [Doc] translate theme & demo pages

* [Doc] add Internationalization document

* [bugfix] remove unnecessary props

packages/dialog/dialog.vue

@@ -44,16 +44,11 @@ export default {
   mixins: [Popup, i18n],
 
   props: {
+    title: String,
+    message: String,
+    callback: Function,
     confirmButtonText: String,
     cancelButtonText: String,
-    title: {
-      type: String,
-      default: ''
-    },
-    message: {
-      type: String,
-      default: ''
-    },
     showConfirmButton: {
       type: Boolean,
       default: true
@@ -62,9 +57,6 @@ export default {
       type: Boolean,
       default: false
     },
-    callback: {
-      type: Function
-    },
     overlay: {
       default: true
     },