[misc] drop the test-fixture narration comment

fastvideo/tests/vaes/test_minimax_h3_parallel_vae.py

@@ -318,8 +318,6 @@ def test_fastvideo_args_strategy_literals_match_module() -> None:
 
 @pytest.fixture
 def tile_parallel():
-    # The tile split replays the per-tile serial forwards, so it stands down when the
-    # serial path batches tiles (FASTVIDEO_H3_VAE_TILE_BATCH=8 by default).
     with envs.FASTVIDEO_H3_VAE_TILE_PARALLEL.override(True), envs.FASTVIDEO_H3_VAE_TILE_BATCH.override(1):
         yield