Accordion Item and Panel: Remove layout from the block supports

[scruffian]

What?

Removes layout support from the Accordion Item and Accordion panel blocks, since its probably only really useful on the Accordion block itself.

Why?

These supports add complexity without adding value.

How?

Just remove from the block.json

Testing Instructions

1. Add an accordion block and some content to it
2. Check that there is noInner blocks use content width setting on the Accordion item or Accordion panel blocks

Screenshots or screencast

[github-actions]

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Co-authored-by: mikachan <mikachan@git.wordpress.org>
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[t-hamano]

Thanks for the quick fix!

Can we just remove the layout field, not define the false value? This is because I don't want the core block reference doc to show ~~layout~~ text.

[scruffian]

Can we just remove the layout field, not define the false value?

Done!

[mikachan]

LGTM!