Description

While working on #21553, I noticed that removing a poster image from a video currently results in a TypeError:

Uncaught TypeError: this is undefined
    onRemovePoster edit.js:157

This PR removes a this reference, I'm guessing left over from the hooks conversion, fixing the TypeError.

Props @Mamaduka for recommending the fix.

How has this been tested?

• Add Video Block
• Select Video
• Select Poster
• Remove Poster
• Notice that there is no longer a TypeError

Screenshots

Types of changes

Bug fix

Checklist:

• My code is tested.
• My code follows the WordPress code style.
• My code follows the accessibility standards.
• I've tested my changes with keyboard and screen readers.
• My code has proper inline documentation.
• I've included developer documentation if appropriate.
• I've updated all React Native files affected by any refactorings/renamings in this PR (please manually search all *.native.js files for terms that need renaming or removal).