webpack: drop eslilnt baseConfig

This causes building with webpack to behave differently than building
without. Also since updating eslint packages, this now causes a build
error because it conflicts with the .eslintrc.js file with regard to
the "react" plugin.

config/webpack.config.js

@@ -787,14 +787,6 @@ module.exports = function (webpackEnv) {
           // ESLint class options
           cwd: paths.appPath,
           resolvePluginsRelativeTo: __dirname,
-          baseConfig: {
-            extends: [require.resolve('eslint-config-react-app/base')],
-            rules: {
-              ...(!hasJsxRuntime && {
-                'react/react-in-jsx-scope': 'error',
-              }),
-            },
-          },
         }),
     ].filter(Boolean),
     // Turn off performance processing because we utilize