Remove reference to wasm file

Webpack doesn't need to pack any wasm binary data.

Author: Willem Wyndham

lib/threading/webpack.config.js

@@ -2,8 +2,6 @@ const fs = require("fs");
 const path = require("path");
 const webpack = require("webpack");
 
-const wasmData = fs.readFileSync(__dirname + "/build/index.wasm");
-
 module.exports = {
   entry: [ "./src/index.ts" ],
   module: {