[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/image-preview/image-preview.vue

@@ -34,9 +34,6 @@ export default {
     overlay: {
       default: true
     },
-    lockOnScroll: {
-      default: true
-    },
     closeOnClickOverlay: {
       default: true
     }