How do I remove unwanted json3 module from my node_modules? - reactjs

Question

I just upgraded my react app to include the newest react router v5.2 in order to get the useHistory hook. Things worked fine until I restarted for the first time next morning. Now when I use f5 to start a debugging session I get an exception in a node-modules file named json3. (BTW, the app runs okay in the browser after yarn start.) The exception is "SyntaxError: Unexpected token in JSON at position 1". The code is line 186 in json3.js:
186 parseSupported = !parse('"\t"');
I read the json3 README.md and it says: "JSON 3 is deprecated and no longer maintained. Please don't use it in new projects, and migrate existing projects to use the native JSON.parse and JSON.stringify instead. JSON 3 was a JSON polyfill for older JavaScript platforms." I don't know how this was installed and I don't think I need it. It's not listed in my package.json. It's at the top level in node_modules. How do I remove this?
Just in case it's needed, my package.json is this:
{
"name": "blue-duck-pwa",
"version": "0.1.0",
"private": true,
"devDependencies": {
"enzyme": "3.2.0",
"enzyme-adapter-react-16": "^1.1.0",
"eslint": "^6.8.0",
"eslint-config-prettier": "^6.10.0",
"eslint-plugin-react": "^7.18.3",
"faker": "^4.1.0",
"prettier": "2.0.1",
"react-scripts": "1.1.0",
"react-test-renderer": "16.0.0",
"redux-devtools": "^3.4.1",
"redux-devtools-dock-monitor": "1.1.4",
"redux-devtools-log-monitor": "2.0.1",
"redux-logger": "^3.0.6"
},
"dependencies": {
"add": "^2.0.6",
"base-64": "^0.1.0",
"bootstrap": "^3.3.7",
"chart.js": "2.9.3",
"cheerio": "0.19.x",
"file-saver": "^1.3.8",
"history": "^4.6.3",
"lodash": "^4.17.4",
"lodash.clonedeep": "^4.5.0",
"prop-types": "15.6.0",
"rc-dropdown": "^2.1.0",
"rc-menu": "^6.2.5",
"react": "16.13.0",
"react-auto-suggest": "^0.0.12",
"react-bootstrap": "0.32.0",
"react-chartjs-2": "2.6.4",
"react-dom": "16.13.0",
"react-notification-system": "0.2.16",
"react-portal": "^4.0.0",
"react-redux": "^5.0.6",
"react-router": "5.2.0",
"react-router-bootstrap": "0.25.0",
"react-router-dom": "5.2.0",
"react-scrollchor": "^4.2.1",
"react-sizes": "1.0.0",
"redux": "^3.7.2",
"redux-promise-middleware": "^5.0.0",
"redux-thunk": "^2.2.0",
"uuid": "^3.1.0",
"xml2js": "0.4.19"
},
"scripts": {
"start": "react-scripts start",
"build": "react-scripts build",
"test": "react-scripts test --env=jsdom",
"eject": "react-scripts eject"
}
}

Answer 1

Because of the conflicts I caused by upgrading my node_modules without regard to breaking changes (dumb I know), I was only able to fix this problem by starting over. I made another create-react-app, copied my package.json (with the corrected version numbers), ran yarn install, then copied over all my program data: src, .vscode, .eslintrc, etc, etc. With a few easy fixes, this worked. No exceptions deep in the node_modules.