ci: remove unused standalone Pages workflow

[sebastianspicker]

The demo is published through the existing sebastianspicker.github.io Hugo Pages site at /otherlight/. Remove the standalone workflow because the otherlight repository has no Pages site configured and its deployment cannot run. The demo source, build script, and README link remain in this repository.

[codacy-production]

Up to standards ✅

🟢 Issues 0 issues

Results:
0 new issues

View in Codacy

AI Reviewer: first review requested successfully. AI can make mistakes. Always validate suggestions.

_{TIP This summary will be updated as you push new changes.}

[codacy-production]

Pull Request Overview

This PR removes a redundant and non-functional GitHub Actions workflow for GitHub Pages. The repository is correctly updated by removing the standalone workflow file while preserving the demo source and build scripts. This is consistent with the repository's setup, as the demo is hosted externally and lacks the specific configuration required for this standalone workflow.

Codacy analysis indicates that the repository remains up to standards following this change. No issues or implementation gaps were found by the review agents.

Test suggestions

• Verify the standalone Pages workflow file is removed from the repository.

_{TIP Improve review quality by adding custom instructions
TIP How was this review? Give us feedback}