Remove no longer needed webpack export default workaround.

Author: timoxley

webpack.config.js

@@ -75,19 +75,6 @@ module.exports = (env, argv) => {
         output: {
             libraryTarget: 'umd2',
             filename: libraryName + '.web.js',
-            // NOTE:
-            // exporting the class directly
-            // `export default class StreamrClient {}`
-            // becomes:
-            // `window.StreamrClient === StreamrClient`
-            // which is correct, but if we define the class and export separately,
-            // which is required if we do interface StreamrClient extends …:
-            // `class StreamrClient {}; export default StreamrClient;`
-            // becomes:
-            // `window.StreamrClient = { default: StreamrClient, … }`
-            // which is wrong for browser builds.
-            // see: https://github.com/webpack/webpack/issues/706#issuecomment-438007763
-            libraryExport: 'default', // This fixes the above.
             library: 'StreamrClient',
         },
         resolve: {