reduce seq len and remove unused imports in decoder_block

Signed-off-by: Ubuntu <ubuntu@UF-EV-B4-GWH01.maas>

Author: Ubuntu

.github/workflows/galaxy-deepseek-tests-long-impl.yaml

@@ -65,9 +65,9 @@ jobs:
         timeout-minutes: 360
         run: |
           uv pip install -r models/demos/deepseek_v3/reference/deepseek/requirements.txt
-          DEEPSEEK_MAX_SEQ_LEN=32768 pytest models/demos/deepseek_v3/tests/test_mla.py --timeout 3600 --durations=0
-          DEEPSEEK_MAX_SEQ_LEN=32768 pytest models/demos/deepseek_v3/tests/test_decoder_block.py --timeout 7200 --durations=0
-          DEEPSEEK_MAX_SEQ_LEN=4096 pytest models/demos/deepseek_v3/tests/test_model.py --timeout 10800 --durations=0
+          DEEPSEEK_MAX_SEQ_LEN=16384 pytest models/demos/deepseek_v3/tests/test_mla.py --timeout 3600 --durations=0
+          DEEPSEEK_MAX_SEQ_LEN=16384 pytest models/demos/deepseek_v3/tests/test_decoder_block.py --timeout 7200 --durations=0
+          DEEPSEEK_MAX_SEQ_LEN=2048 pytest models/demos/deepseek_v3/tests/test_model.py --timeout 10800 --durations=0
       - uses: tenstorrent/tt-metal/.github/actions/slack-report@main
         if: ${{ failure() }}
         with:

models/demos/deepseek_v3/tests/test_decoder_block.py

@@ -13,8 +13,6 @@
 from models.demos.deepseek_v3.conftest import PREFILL_SEQ_LENS
 from models.demos.deepseek_v3.reference.modeling_deepseek import DeepseekV3DecoderLayer
 from models.demos.deepseek_v3.tests.pytest_utils import build_test_cases_and_ids
-from models.demos.deepseek_v3.tt.decoder_block.decoder_block_1d import DecoderBlock1D
-from models.demos.deepseek_v3.tt.decoder_block.decoder_block_1d_base import DecoderBlock1DBase
 from models.demos.deepseek_v3.tt.decoder_block.decoder_block_2d import DecoderBlock2D
 from models.demos.deepseek_v3.tt.decoder_block.decoder_block_2d_base import DecoderBlock2DBase
 from models.demos.deepseek_v3.tt.decoder_block.moe_decoder_block_2d import MoEDecoderBlock2D