Remove unlicensed Plash entry

[sean0407]

Summary

Remove Plash from the catalog in response to #1419. The change removes only its entry from applications.json.

Project URL

https://github.com/sindresorhus/Plash

Category

wallpaper, browser

Description

Make any website your desktop wallpaper.

Why it should be included to Awesome macOS open source applications (optional)

This is a removal: the upstream repository has no declared license or LICENSE file, and the contribution guide lists missing licenses as a reason to remove a project.

Evidence

• Before: gh repo view sindresorhus/Plash reported no license metadata; the default-branch checkout has no LICENSE file.
• After: Plash's entry is removed from applications.json; JSON parsing and git diff --check pass.
• CONTRIBUTING.md lists “Lacks license” as a valid removal reason.

Merge Danger

Door: two-way

Blast Radius: low

Checklist

• Edited applications.json instead of README.md.
• Only one project/change is in this pull request.
• Screenshots are not applicable to this removal.
• The upstream project has a commit from less than two years ago.
• The upstream project has a clear README in English.