UWP build target is visible on unsupported platforms

Steps to reproduce:

1. Open any project (on Mac or Linux)
2. Go to File>Build Profiles...
3. Observe that Universal Windows Platform is available in the build target list

Actual result: UWP is erroneously displayed on Mac/Linux even though it is impossible to build on those platforms

Expected result: UWP is not displayed (as it is not displayed in the old Build Settings window, either)

Reproducible with: 2023.3.0b3, 2023.3.0b6 using a non-Windows OS