[runtime/msbuild] Clean up some unused code.

[rolfbjarne]

No description provided.

[Copilot]

Pull request overview

This PR removes unused code related to watch apps and deprecated Xamarin.Mac launch functionality. It cleans up obsolete properties and methods from the MSBuild tasks and removes the unused launch.h header file from the runtime.

• Removed unused launch.h header file containing deprecated Xamarin.Mac launch sequence documentation
• Cleaned up unused MSBuild task properties (AssemblyName, Debug, DebugIPAddresses, IsWatchApp, IsWatchExtension, IsXPCService)
• Removed obsolete methods related to watch app handling (SetAppTransportSecurity, watch-specific logic in CompileMac/CompileMobile)

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated no comments.

File	Description
runtime/xamarin/launch.h	Complete removal of obsolete header file documenting Xamarin.Mac launch sequence
msbuild/Xamarin.Shared/Xamarin.Shared.targets	Removed unused parameters from CompileAppManifest task invocations
msbuild/Xamarin.MacDev.Tasks/Tasks/CompileAppManifest.cs	Removed unused properties and methods, simplified watch app handling to always use non-watch platform names

[vs-mobiletools-engineering-service2]

✅ [CI Build #d4b01f0] Build passed (Build packages) ✅

Pipeline on Agent
Hash: d4b01f0ced4766fd6dac2a779ed9738a2952bf26 [PR build]

[vs-mobiletools-engineering-service2]

✅ [PR Build #d4b01f0] Build passed (Detect API changes) ✅

Pipeline on Agent
Hash: d4b01f0ced4766fd6dac2a779ed9738a2952bf26 [PR build]

[vs-mobiletools-engineering-service2]

✅ API diff for current PR / commit

NET (empty diffs)

• iOS: vsdrops gist ( No breaking changes )
• tvOS: vsdrops gist ( No breaking changes )
• MacCatalyst: vsdrops gist ( No breaking changes )
• macOS: vsdrops gist ( No breaking changes )

✅ API diff vs stable

NET (empty diffs)

• iOS: vsdrops gist ( No breaking changes )
• tvOS: vsdrops gist ( No breaking changes )
• MacCatalyst: vsdrops gist ( No breaking changes )
• macOS: vsdrops gist ( No breaking changes )

ℹ️ Generator diff

Generator Diff: vsdrops (html) vsdrops (raw diff) gist (raw diff) - Please review changes)

Pipeline on Agent
Hash: d4b01f0ced4766fd6dac2a779ed9738a2952bf26 [PR build]

[vs-mobiletools-engineering-service2]

✅ [CI Build #d4b01f0] Build passed (Build macOS tests) ✅

Pipeline on Agent
Hash: d4b01f0ced4766fd6dac2a779ed9738a2952bf26 [PR build]

[vs-mobiletools-engineering-service2]

💻 [CI Build #d4b01f0] Tests on macOS X64 - Mac Sonoma (14) passed 💻

✅ All tests on macOS X64 - Mac Sonoma (14) passed.

Pipeline on Agent
Hash: d4b01f0ced4766fd6dac2a779ed9738a2952bf26 [PR build]

[vs-mobiletools-engineering-service2]

💻 [CI Build #d4b01f0] Tests on macOS M1 - Mac Ventura (13) passed 💻

✅ All tests on macOS M1 - Mac Ventura (13) passed.

Pipeline on Agent
Hash: d4b01f0ced4766fd6dac2a779ed9738a2952bf26 [PR build]

[vs-mobiletools-engineering-service2]

💻 [CI Build #d4b01f0] Tests on macOS M1 - Mac Monterey (12) passed 💻

✅ All tests on macOS M1 - Mac Monterey (12) passed.

Pipeline on Agent
Hash: d4b01f0ced4766fd6dac2a779ed9738a2952bf26 [PR build]

[vs-mobiletools-engineering-service2]

💻 [CI Build #d4b01f0] Tests on macOS arm64 - Mac Sequoia (15) passed 💻

✅ All tests on macOS arm64 - Mac Sequoia (15) passed.

Pipeline on Agent
Hash: d4b01f0ced4766fd6dac2a779ed9738a2952bf26 [PR build]

[vs-mobiletools-engineering-service2]

💻 [CI Build #d4b01f0] Tests on macOS arm64 - Mac Tahoe (26) passed 💻

✅ All tests on macOS arm64 - Mac Tahoe (26) passed.

Pipeline on Agent
Hash: d4b01f0ced4766fd6dac2a779ed9738a2952bf26 [PR build]

[vs-mobiletools-engineering-service2]

🚀 [CI Build #d4b01f0] Test results 🚀

Test results

✅ All tests passed on VSTS: test results.

🎉 All 119 tests passed 🎉

Tests counts

✅ cecil: All 1 tests passed. Html Report (VSDrops) Download
✅ dotnettests (iOS): All 1 tests passed. Html Report (VSDrops) Download
✅ dotnettests (MacCatalyst): All 1 tests passed. Html Report (VSDrops) Download
✅ dotnettests (macOS): All 1 tests passed. Html Report (VSDrops) Download
✅ dotnettests (Multiple platforms): All 1 tests passed. Html Report (VSDrops) Download
✅ dotnettests (tvOS): All 1 tests passed. Html Report (VSDrops) Download
✅ framework: All 2 tests passed. Html Report (VSDrops) Download
✅ fsharp: All 4 tests passed. Html Report (VSDrops) Download
✅ generator: All 5 tests passed. Html Report (VSDrops) Download
✅ interdependent-binding-projects: All 4 tests passed. Html Report (VSDrops) Download
✅ introspection: All 4 tests passed. Html Report (VSDrops) Download
✅ linker: All 44 tests passed. Html Report (VSDrops) Download
✅ monotouch (iOS): All 9 tests passed. Html Report (VSDrops) Download
✅ monotouch (MacCatalyst): All 11 tests passed. Html Report (VSDrops) Download
✅ monotouch (macOS): All 9 tests passed. Html Report (VSDrops) Download
✅ monotouch (tvOS): All 11 tests passed. Html Report (VSDrops) Download
✅ msbuild: All 2 tests passed. Html Report (VSDrops) Download
✅ windows: All 3 tests passed. Html Report (VSDrops) Download
✅ xcframework: All 4 tests passed. Html Report (VSDrops) Download
✅ xtro: All 1 tests passed. Html Report (VSDrops) Download

Pipeline on Agent
Hash: d4b01f0ced4766fd6dac2a779ed9738a2952bf26 [PR build]