remove group index ut

Author: shbiswas834

fbgemm_gpu/test/sparse/index_select_test.py

@@ -1,4 +1,4 @@
- #!/usr/bin/env python3
+#!/usr/bin/env python3
 # Copyright (c) Meta Platforms, Inc. and affiliates.
 # All rights reserved.
 #
@@ -239,34 +239,6 @@ def compare_tensor_groups(
             {"rtol": 1e-02, "atol": 1e-02} if dtype == torch.half else {},
         )
 
-    @unittest.skipIf(not gpu_available, "CUDA not available")
-    def test_group_index_select_dim0_duplicate_gradients(self) -> None:
-        device = torch.device("cuda")
-        dtype = torch.float
-
-        num_rows = 4
-        num_cols = 9
-        indices = torch.tensor([0, 1, 2, 1, 0, 2], dtype=torch.long, device=device)
-
-        input_tensor = torch.randn(
-            (num_rows, num_cols), dtype=dtype, device=device
-        ).requires_grad_(True)
-
-        output_group = torch.ops.fbgemm.group_index_select_dim0(
-            [input_tensor], [indices]
-        )
-        output = output_group[0]
-
-        grad = torch.arange(
-            output.numel(), dtype=dtype, device=device
-        ).view_as(output)
-        output.backward(grad)
-
-        ref_grad = torch.zeros_like(input_tensor)
-        ref_grad.index_add_(0, indices, grad)
-
-        torch.testing.assert_close(input_tensor.grad, ref_grad)
-
     @given(
         num_inputs=st.integers(0, 100),
         max_input_rows=st.integers(2, 32),