fix(browser): revert the viewport scaling in non-ui mode #9018 (#9072)

Author: sheremet-va

packages/browser-playwright/src/playwright.ts

@@ -365,10 +365,11 @@ export class PlaywrightBrowserProvider implements BrowserProvider {
     if (this.project.config.browser.ui) {
       options.viewport = null
     }
-    else {
-      // if UI is disabled, keep the iframe scale to 1
-      options.viewport ??= this.project.config.browser.viewport
-    }
+    // TODO: investigate the consequences for Vitest 5
+    // else {
+    // if UI is disabled, keep the iframe scale to 1
+    // options.viewport ??= this.project.config.browser.viewport
+    // }
     const context = await browser.newContext(options)
     await this._throwIfClosing(context)
     if (actionTimeout != null) {