Cleanup unused Javascript (#3027)

* chore(js): be stricter about dead code warnings

* chore(js): remove dead code and unused exports

* rebase

* chore: remove unused files

* chore(deps): remove unused prop-types dep

* chore(js): remove unused function

* chore(deps): remove + check unused deps

* chore(js): remove unused exports. Closes #3036

web/.eslintrc.js

@@ -19,7 +19,7 @@ module.exports = {
     ecmaVersion: 12,
     sourceType: 'module',
   },
-  plugins: ['react', 'prettier', '@typescript-eslint'],
+  plugins: ['react', 'prettier', '@typescript-eslint', 'import'],
   ignorePatterns: ['!./storybook/**'],
   rules: {
     'prettier/prettier': 'error',
@@ -75,6 +75,7 @@ module.exports = {
         peerDependencies: true,
       },
     ],
+    'import/no-unused-modules': [1, { unusedExports: true }],
   },
   settings: {
     'import/resolver': {