chore(migrate): migrate card toggle button visible only for old domain

src/views/StationsView.vue

@@ -14,6 +14,7 @@
 
         <div class="topbar-links">
           <button
+            v-if="isOldStacjownikDomain"
             class="btn--image migrate-info-button"
             @click="toggleMigrateInfoCard(true)"
             data-tooltip-type="HtmlTooltip"
@@ -126,6 +127,12 @@ export default defineComponent({
     toggleLocales() {
       this.mainStore.changeLocale(this.mainStore.currentLocale == 'pl' ? 'en' : 'pl');
     }
+  },
+
+  computed: {
+    isOldStacjownikDomain() {
+      return location.hostname == 'stacjownik-td2.web.app';
+    }
   }
 });
 </script>