Fix lint error

Author: kunlunl

tests/unit_tests/context_parallel/test_packing_and_hybrid_cp.py

@@ -11,15 +11,11 @@
 
 from megatron.core import mpu, parallel_state
 from megatron.core.datasets.data_schedule import get_batch_on_this_rank_for_sequence_packing
-from megatron.core.models.gpt.gpt_layer_specs import (
-    get_gpt_decoder_block_spec,
-)
+from megatron.core.models.gpt.gpt_layer_specs import get_gpt_decoder_block_spec
 from megatron.core.models.gpt.gpt_layer_specs import (
     get_gpt_layer_with_transformer_engine_spec as gpt_te_spec,
 )
-from megatron.core.models.gpt.gpt_layer_specs import (
-    get_gpt_mtp_block_spec,
-)
+from megatron.core.models.gpt.gpt_layer_specs import (get_gpt_mtp_block_spec
 from megatron.core.models.gpt.gpt_model import GPTModel
 from megatron.core.num_microbatches_calculator import (
     init_num_microbatches_calculator,