Remove pyright exclusion for tests/worker/workflow_sandbox/test_importer.py

File was already type-clean, no fixes needed.

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <[email protected]>

Author: tconley1428

pyproject.toml

@@ -202,7 +202,6 @@ exclude = [
   "temporalio/api",
   "temporalio/bridge/proto",
   "tests/worker/workflow_sandbox/testmodules/proto",
-  "tests/worker/workflow_sandbox/test_importer.py",
   "tests/worker/workflow_sandbox/test_restrictions.py",
 ]