chore(webpack): remove script-ext-html-webpack-plugin (#2534)

Co-authored-by: Seve Badajoz <severiano.badajoz@chanzuckerberg.com>

client/configuration/webpack/webpack.config.dev.js

@@ -1,7 +1,6 @@
 const path = require("path");
 const webpack = require("webpack");
 const HtmlWebpackPlugin = require("html-webpack-plugin");
-const ScriptExtHtmlWebpackPlugin = require("script-ext-html-webpack-plugin");
 const MiniCssExtractPlugin = require("mini-css-extract-plugin");
 
 const { merge } = require("webpack-merge");
@@ -57,9 +56,6 @@ const devConfig = {
         CXG_SERVER_PORT: process.env.CXG_SERVER_PORT || "5005",
       }),
     }),
-    new ScriptExtHtmlWebpackPlugin({
-      async: "obsolete",
-    }),
   ],
   infrastructureLogging: {
     level: "warn",