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Remove possibly outdated comment

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Currently, the error is alerted and the console is empty (at least in Chrome).
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Vse Mozhe Buty 2020-10-20 23:22:00 +03:00 • committed by GitHub
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1-js/06-advanced-functions/04-var/article.md
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@ -82,7 +82,7 @@ function sayHi() {
}
sayHi();
alert(phrase); // Error: phrase is not defined (Check the Developer Console)
alert(phrase); // Error: phrase is not defined
```
As we can see, `var` pierces through `if`, `for` or other code blocks. That's because a long time ago in JavaScript, blocks had no Lexical Environments, and `var` is a remnant of that.