Remove block-level duotone from skatepark patterns and templates

[ajlende]

Changes proposed in this Pull Request:

Remove unnecessary block-level duotone filters in skatepark—these filters are already applied globally.

Additionally, it will be easier to use these patterns in other themes since the custom duotone won't be attached.

[jeryj]

I checked the theme.json for skatepark and see core/image is using the default duotone filter which is ["#000","#B9FB9C"]. This image uses a slightly different (more muted) green of #BFF5A5. I'm not sure if that was originally intentional or a mistake. I don't think anyone would notice the change, but I wanted to point it out here to make sure.

[jeryj]

I see a precedent for changing from #BFF5A5 to #B9FB9C, and honestly can't imagine someone would visually notice the distinction between the two, so I don't think this should be a blocker.

[jeryj]

I used the columns-in-container template to compare trunk to this branch and they present identically on the frontend, but in the editor the duotone from theme doesn't apply. The top image is inserted from trunk template with the manual duotone vs the theme.json applied duotone on the bottom which doesn't show the duotone in the editor. I'm guessing that's a separate issue, but commenting to confirm.

[MaggieCabrera]

Yes, I think this is a good change. The bug where the filter is missing on the editor for the patterns is a duotone issue that we should fix in the editor. I will look for the issue and if there is none I'll open one.

[MaggieCabrera]

This is the one! WordPress/gutenberg#48586

[jffng]

Cool work! LGTM, also noted that issue y'all already caught above with the post editor.