chore: remove old comment from playwright config (#27973)

Issue number: #

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## What is the current behavior?
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Shawn noted that I had an outdated comment in the `playwright.config.ts`
file when working on
https://github.com/ionic-team/ionic-framework/pull/27961:
https://github.com/ionic-team/ionic-framework/pull/27961#pullrequestreview-1572374939
 
## What is the new behavior?
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this PR. -->

- Remove the old comment

## Does this introduce a breaking change?

- [ ] Yes
- [x] No

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## Other information

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