WebAssembly dry run warning in pdfx: default parameter initializers on static interop externals

[anthonymoretti]

Describe the bug
When building Flutter web with wasm dry run enabled, pdfx reports warnings from pdfjs.dart about default parameter initializers on static interop external functions.

To Reproduce
Steps to reproduce the behavior:

1. Create a Flutter app.
2. Add pdfx: 2.9.2.
3. Run flutter build web --no-tree-shake-icons.
4. See warnings in package:pdfx/src/renderer/web/pdfjs.dart (around lines 136-138, 205-207): “Initializers for parameters are ignored on static interop external functions.”

Expected behavior
No wasm dry-run warnings from pdfx static interop declarations.

Smartphone (please complete the following information):

• Device: N/A
• OS: macOS
• Version: Flutter 3.41.7, Dart 3.11.5, pdfx 2.9.2

[anthonymoretti]

Here is a screenshot: