[admin] Remove unused images

[AlexJerabek]

These images aren't used and should be removed to avoid confusion.

[learn-build-service-prod]

Learn Build status updates of commit 77175b0:

✅ Validation status: passed

File	Status	Preview URL	Details
docs/images/code-editor-feedback.png	✅Succeeded	n/a (file deleted or renamed)
docs/images/load-sync.png	✅Succeeded	n/a (file deleted or renamed)
docs/images/load-sync.vsdx	✅Succeeded	n/a (file deleted or renamed)
docs/images/power-automate-return-tutorial-7.PNG	✅Succeeded	n/a (file deleted or renamed)
docs/images/reference-documentation-version-picker.png	✅Succeeded	n/a (file deleted or renamed)
docs/images/script-sharing.png	✅Succeeded	n/a (file deleted or renamed)
docs/images/teaser-animation.gif	✅Succeeded	n/a (file deleted or renamed)

For more details, please refer to the build report.