chore: remove unused nightly release from CI (#719)

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### 🔗 Linked issue

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example "Resolves #123" -->
Resolves #716

### ❓ Type of change

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the boxes that apply. -->

- [ ] 📖 Documentation (updates to the documentation or readme)
- [ ] 🐞 Bug fix (a non-breaking change that fixes an issue)
- [ ] 👌 Enhancement (improving an existing functionality)
- [ ] ✨ New feature (a non-breaking change that adds functionality)
- [x] 🧹 Chore (updates to the build process or auxiliary tools and
libraries)
- [ ] ⚠️ Breaking change (fix or feature that would cause existing
functionality to change)

### 📚 Description

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<!-- Why is this change required? What problem does it solve? -->
To keep the CI green when the necessary checks pass, and only have
failing CI runs when there is an actual problem.