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

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

client/configuration/webpack/webpack.config.shared.js

@@ -2,8 +2,6 @@ const path = require("path");
 const fs = require("fs");
 const MiniCssExtractPlugin = require("mini-css-extract-plugin");
 const ObsoleteWebpackPlugin = require("obsolete-webpack-plugin");
-// eslint-disable-next-line @blueprintjs/classes-constants -- incorrect match
-const ScriptExtHtmlWebpackPlugin = require("script-ext-html-webpack-plugin");
 
 const src = path.resolve("src");
 const nodeModules = path.resolve("node_modules");
@@ -67,8 +65,5 @@ module.exports = {
       template: obsoleteHTMLTemplate,
       promptOnNonTargetBrowser: false,
     }),
-    new ScriptExtHtmlWebpackPlugin({
-      async: "obsolete",
-    }),
   ],
 };