feat: Add inherit from basic/longitudinal modes (#5435)

Co-authored-by: Ibrahim <ibrahim.mdev@gmail.com>

modes/longitudinal/.webpack/webpack.prod.js

@@ -1,7 +1,6 @@
 const webpack = require('webpack');
 const { merge } = require('webpack-merge');
 const path = require('path');
-const MiniCssExtractPlugin = require('mini-css-extract-plugin');
 
 const pkg = require('./../package.json');
 const webpackCommon = require('./../../../.webpack/webpack.base.js');