fix: remove weapp runtime resets

The resets conflict with core-js global detection.
They are no longer required as we mvoe to the adapter approach

Author: leeyeh

webpack/weapp.js

@@ -1,4 +1,3 @@
-const webpack = require('webpack');
 const { create, entry, name } = require('./common');
 
 const config = create();
@@ -8,12 +7,5 @@ config.entry = {
   [`${name}-weapp-min`]: entry,
 };
 config.resolve.aliasFields = ['weapp', 'browser'];
-config.plugins.push(
-  new webpack.BannerPlugin({
-    banner:
-      'var window={};var XMLHttpRequest;var navigator;var localStorage;function Function(){return function(){}};',
-    raw: true,
-  })
-);
 
 module.exports = config;