Update packages/nx-plugin/eslint.config.js

Co-authored-by: Matěj Chalk <34691111+matejchalk@users.noreply.github.com>

Author: BioPhoton

packages/nx-plugin/eslint.config.js

@@ -17,7 +17,6 @@ module.exports = tseslint.config(
     rules: {
       // Nx plugins don't yet support ESM: https://github.com/nrwl/nx/issues/15682
       'unicorn/prefer-module': 'off',
-      'n/file-extension-in-import': 'off',
       // used instead of verbatimModuleSyntax tsconfig flag (requires ESM)
       '@typescript-eslint/consistent-type-imports': [
         'warn',