chore: remove stale test and typecheck configuration

pyproject.toml

@@ -81,10 +81,6 @@ exclude = [
     "^src/shepherd_kernel_v3_reference/spikes/",
 ]
 
-[[tool.mypy.overrides]]
-module = "shepherd_core.export.atif"
-warn_unused_ignores = false
-
 [[tool.mypy.overrides]]
 module = "shepherd_export.atif"
 warn_unused_ignores = false

shepherd/packages/dialect/pyproject.toml

@@ -53,7 +53,6 @@ pythonpath = ["src", "tests"]
 addopts = ["-q", "-m", "not container"]
 markers = [
     "container: needs Linux kernel features (Landlock, fuse-overlayfs); run via `make test_container` in vcs-core/packages/core",
-    "workspace_component: fast workspace-control unit/component tests with no real retained-run workspace",
     "workspace_smoke: minimal real workspace-control canaries for the local fast lane",
     "workspace_native_jail: workspace-control tests that require a proven native syscall jail",
     "slow: expensive /workspace-control scenario tests excluded from fast local dialect checks",

shepherd/packages/runtime/tests/unit/device/test_device_infrastructure.py

@@ -347,14 +347,6 @@ def test_device_context_handles_cleanup_exceptions(self):
             # Sandbox should be removed from tracking even if cleanup fails
             assert "failing-sandbox" not in sandboxes
 
-    @pytest.mark.skip(reason="Device nesting is now prohibited - see test_device_context_nested_raises_error")
-    def test_device_context_cleans_nested_device_sandboxes_independently(self):
-        """Nested Device contexts should clean their own sandboxes.
-
-        NOTE: This test is skipped because Device nesting is now prohibited.
-        The test_device_context_nested_raises_error test verifies this behavior.
-        """
-
     def test_device_context_uses_discard_if_no_cleanup(self):
         """Device context should use discard() if cleanup() is not available."""
         from shepherd_runtime.scope import Scope