feat(cli): set title by lang

packages/vant-cli/site/desktop/components/Simulator.vue

@@ -9,8 +9,7 @@ export default {
   name: 'van-doc-simulator',
 
   props: {
-    src: String,
-    lang: String
+    src: String
   },
 
   data() {
@@ -33,12 +32,6 @@ export default {
     }
   },
 
-  watch: {
-    lang(val) {
-      location.hash = `#${location.hash.replace(this.lang, val)}`;
-    }
-  },
-
   mounted() {
     window.addEventListener('scroll', () => {
       this.scrollTop = window.scrollY;