chore(webpack): Remove outdated config for hmr

Signed-off-by: Julius Härtl <jus@bitgrid.net>

webpack.hot.js

@@ -1,26 +0,0 @@
-const webpack = require('webpack');
-const merge = require('webpack-merge');
-const dev = require('./webpack.dev.js');
-
-module.exports = merge(dev, {
-	devServer: {
-		hot: true,
-		port: 3000,
-		/**
-		 * This makes sure the main entrypoint is written to disk so it is
-		 * loaded by Nextcloud though our existing addScript calls
-		 */
-		writeToDisk: (filePath) => {
-			return /deck\.js$/.test(filePath);
-		},
-		headers: {
-			'Access-Control-Allow-Origin': '*'
-		}
-	},
-	plugins: [
-		new webpack.DefinePlugin({
-			'process.env.NODE_ENV': JSON.stringify(process.env.NODE_ENV),
-			'process.env.HOT': true
-		})
-	]
-})