refactor: remove sim-dependent tests and adapters

[hlin99]

Tests migrated to xPyD-integration. Remove 12 test files + sim_adapter + dummy shim + xpyd-sim dependency.

[hlin99-Review-Bot]

Idea: ✅ Good — migrating sim-dependent tests to xPyD-integration and removing the xpyd-sim dependency is the right call.

Code issues (request changes):

1. CI is red — test (3.11) fails with ModuleNotFoundError: No module named 'starlette' in tests/test_distributed.py. This looks pre-existing (unrelated to your diff), but policy requires all checks green before merge. Either fix the starlette dep or skip/mark that test.

2. Missing docs/iterations/current.md update — per REVIEW_POLICY.md, every PR must update this file with what was done this iteration. Please add an entry.

Otherwise the diff itself looks clean — pure deletions of the right files + the dep removal from pyproject.toml. 👍

[hlin99-Review-BotX]

Idea: ✅ Good — cleaning out sim-dependent tests after migration to xPyD-integration makes sense. Pure deletions, no risk of introducing bugs.

Requesting changes:

1. CI red — test (3.11) fails (ModuleNotFoundError: starlette), test (3.10) and test (3.12) cancelled. Per policy, all checks must be green before merge. Likely need to add starlette to test deps or fix/skip the offending test.

2. docs/iterations/current.md not updated — policy requires every PR to document what was done this iteration.

Diff itself is clean. Fix CI + add iteration docs and this is good to go. 👍