refactor(ct-angular): remove useless NODE_ENV=test

as we are setting the tsconfig manually
Cf. https://github.com/sand4rt/playwright/pull/5#discussion_r1541172952

packages/playwright-ct-angular/index.js

@@ -17,8 +17,6 @@
 const { test, expect, devices, defineConfig: originalDefineConfig } = require('@playwright/experimental-ct-core');
 const path = require('path');
 
-process.env['NODE_ENV'] = 'test';
-
 const defineConfig = (config, ...configs) => {
   return originalDefineConfig({
     ...config,