test: remove BATCH_CLIENT_PARAMS xfail, now in core

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: Nissan Pow

test/unit/localbatch/test_localbatch.py

@@ -333,11 +333,7 @@ def test_inject_env_is_visible_inside_container(self):
 # ---------------------------------------------------------------------------
 
 
-_NEEDS_CORE_BATCH_PARAMS = pytest.mark.xfail(
-    reason="requires npow/core-deployer-changes: BATCH_CLIENT_PARAMS must be added "
-    "to metaflow_config.py so METAFLOW_BATCH_CLIENT_PARAMS env var is recognized",
-    strict=False,
-)
+_NEEDS_CORE_BATCH_PARAMS = lambda f: f  # no-op: BATCH_CLIENT_PARAMS now in core
 
 
 @pytest.mark.docker