[jsparser]: disable sourcemap as we dont use it at all (#1796)

Co-authored-by: Nathan Walker <walkerrunpdx@gmail.com>
[skip ci]

Author: farfromrefug

test-app/build-tools/jsparser/webpack.config.js

@@ -12,4 +12,5 @@ module.exports = {
     path: path.join(__dirname, "build"),
     filename: "js_parser.js",
   },
+  devtool: false
 };