Remove Gallery Block V1 and other experimental flags

[geriux]

Related PRs:

• Gallery Block: Cleanup v1 code WordPress/gutenberg#63285

To test:

PR submission checklist:

• I have considered adding unit tests where possible.
• I have considered if this change warrants user-facing release notes more info and have added them to RELEASE-NOTES.txt if necessary.

[dcalhoun]

The Gallery block appears to function as expected. 👍🏻

I noted oddities on both iOS and Android that appear unrelated to these changes. Do you encounter these as well?

When appending an image to a Gallery block, it will also show an If uploading to a gallery all files need to be image formats error toast. If the appended image already exists in the Gallery, the image will not be added. However, using the block inserter while focused upon a Gallery item, the image is added successfully. At times, the order of Gallery items is also unexpectedly shuffled.

This appears to be occurring as far back as release 24.6.

Error toast message

Screen recording

RPReplay_Final1720554628.MP4

Steps to Reproduce:

1. Insert a Gallery block.
2. Select media for the block.
3. Move block selection to the Gallery block.
4. Tap the inline appender.
5. Add media already within the Gallery block.
6. Note the error message and lack of new image.
7. Move block selection to an Image block within the Gallery block.
8. Tap the block inserter in the toolbar.
9. Add media already within the Gallery block.
10. Note the image is added.
11. Move block selection to the Gallery block.
12. Tap the inline appender.
13. Add media already within the Gallery block.
14. Note the error message, the lack of new image, and the existing images order is reshuffled.

[geriux]

When appending an image to a Gallery block, it will also show an If uploading to a gallery all files need to be image formats error toast.

I did notice that one, I forgot to mention it in the PR 😅 I was planning to work on that next.

If the appended image already exists in the Gallery, the image will not be added. However, using the block inserter while focused upon a Gallery item, the image is added successfully. At times, the order of Gallery items is also unexpectedly shuffled.

Oh wow, this I did not notice, it seems a bit broken 🥲 I'll take a look so we can ship a fix for at least some of the issues. Thanks for the review and testing!

[geriux]

I'm working on the issues above in WordPress/gutenberg#63426 I'll merge this PR and open a new one for the other fix.