Details

• Browser and browser version: N/A
• OS version: macOS 12.4
• xterm.js version: 5.0.0

Steps to reproduce

1. Run const xterm = new Terminal({ ... }); without specifying allowProposedApi: true
2. Call xterm.registerLinkProvider()

In version 5 the documentation changed implying that it is no longer experimental, but the check is still present in the source code.