test: remove unused rotary embeddings in SFA tests

Updates SFA v1 unit tests to no longer initialize `cos` and `sin` tensors.

These values are not required for the tested scenarios, so they are now set to `None` to simplify the test setup.

Signed-off-by: Yizhou Liu <[email protected]>

Author: yiz-liu

tests/ut/attention/test_sfa_v1.py

@@ -124,8 +124,8 @@ def test_ascend_sfa_metadata_builder_build(self):
         common_attn_metadata.attn_mask = None
         common_attn_metadata.attn_state = AscendAttentionState.ChunkedPrefill
         common_attn_metadata.block_table_tensor = torch.randn(100, 4)
-        common_attn_metadata.cos = torch.ones(256, 1, 1, 64)
-        common_attn_metadata.sin = torch.zeros(256, 1, 1, 64)
+        common_attn_metadata.cos = None
+        common_attn_metadata.sin = None
         common_attn_metadata.num_input_tokens = 100
 
         model = MagicMock()
@@ -169,8 +169,8 @@ def test_ascend_sfa_metadata_builder_build_for_graph_capture(self):
         common_attn_metadata.attn_mask = None
         common_attn_metadata.attn_state = AscendAttentionState.ChunkedPrefill
         common_attn_metadata.block_table_tensor = torch.randn(100, 4)
-        common_attn_metadata.cos = torch.ones(256, 1, 1, 64)
-        common_attn_metadata.sin = torch.zeros(256, 1, 1, 64)
+        common_attn_metadata.cos = None
+        common_attn_metadata.sin = None
         common_attn_metadata.num_input_tokens = 100
 
         model = MagicMock()