fix cpu ci test (meta-pytorch#3524)

Summary:
Pull Request resolved: meta-pytorch#3524

for non GPU environment, skip the ut

Reviewed By: kausv

Differential Revision: D86475425

fbshipit-source-id: 4033dccce93e9b3b1241e1b6171ce9be985474b7

Author: emlin

torchrec/distributed/tests/test_sequence_model_parallel.py

@@ -390,7 +390,11 @@ class DedupIndicesWeightAccumulationTest(unittest.TestCase):
     This tests the correctness of the new scatter_add_along_first_dim implementation.
     """
 
-    # to be deleted
+    # pyre-fixme[56]: Pyre was not able to infer the type of argument
+    @unittest.skipIf(
+        not torch.cuda.is_available(),
+        "Not enough GPUs, this test requires at least one GPU",
+    )
     def test_dedup_indices_weight_accumulation(self) -> None:
         """
         Test the _dedup_indices method to ensure weight accumulation works correctly