**Steps to replicate the issue** (include links if applicable):
* Go to https://meta.wikimedia.org/wiki/Special:TranslatorSignup
**What happens?**:
* The page summary appears multiple times. In this case the page summary is at: https://meta.wikimedia.org/wiki/MediaWiki:Translatorsignup-summary
**What should have happened instead?**:
* The page summary should only appear once
**Software version** (skip for WMF-hosted wikis like Wikipedia):
* MediaWiki 1.41.0-wmf.3
* TranslatorSignup 1.41.0-wmf.3
**Other information** (browser name/version, screenshots, etc.):
{F36945429 width=750}
This patch was submitted to fix the issue: https://gerrit.wikimedia.org/r/c/mediawiki/extensions/TranslationNotifications/+/906614/1
But with that patch in place on my local machine I now see `translationnotifications-text` added to the header.
{F36945434 width=750}
Calling `$form->setHeaderHtml( '' );` fixes the issue.