Remove clone data in PyTorch profiling

[gau-nernst]

Right now it looks like this

  -----------------------------------------------------  ------------  ------------  ------------  ------------  ------------  ------------  ------------  ------------  ------------  ------------  
                                                   Name    Self CPU %      Self CPU   CPU total %     CPU total  CPU time avg     Self CUDA   Self CUDA %    CUDA total  CUDA time avg    # of Calls  
  -----------------------------------------------------  ------------  ------------  ------------  ------------  ------------  ------------  ------------  ------------  ------------  ------------  
                                            aten::copy_         0.00%      64.939us         0.00%     117.867us      23.573us       2.395us        64.50%       2.395us       0.479us             5  
                         Memcpy DtoD (Device -> Device)         0.00%       0.000us         0.00%       0.000us       0.000us       2.395us        64.50%       2.395us       0.479us             5  
                                   aiter::gemm_a4w4_asm        28.59%       22.632s        28.59%       22.634s       22.634s       0.839us        22.60%       0.839us       0.839us             1  
      aiter::f4gemm_bf16_per1x32Fp4_BpreShuffle_192x128         0.00%       0.000us         0.00%       0.000us       0.000us       0.839us        22.60%       0.839us       0.839us             1  
                 _dynamic_mxfp4_quant_kernel_asm_layout         0.00%       0.000us         0.00%       0.000us       0.000us       0.479us        12.90%       0.479us       0.479us             1  
                                    hipFuncGetAttribute         0.00%       1.000us         0.00%       1.000us       0.333us       0.479us        12.90%       0.479us       0.160us             3  
                            hipGetDevicePropertiesR0600         0.00%       3.570us         0.00%       3.570us       0.892us       0.479us        12.90%       0.479us       0.120us             4  
                                 hipPointerGetAttribute         0.00%       2.920us         0.00%       2.920us       0.973us       0.479us        12.90%       0.479us       0.160us             3  
                                            aten::clone         0.00%      23.480us         0.00%     258.624us      51.725us       0.000us         0.00%       2.395us       0.479us             5  
                                    aten::empty_strided         0.00%      67.668us         0.00%     117.277us      23.455us       0.000us         0.00%       0.000us       0.000us             5  
                                         hipMemcpyAsync         0.00%      52.928us         0.00%      52.928us      10.586us       0.000us         0.00%       0.000us       0.000us             5  
                                   hipStreamIsCapturing         0.00%       1.450us         0.00%       1.450us       1.450us       0.000us         0.00%       0.000us       0.000us             1  
                                              hipMalloc         0.00%      48.159us         0.00%      48.159us      48.159us       0.000us         0.00%       0.000us       0.000us             1  
                                            aten::empty         0.00%     248.794us         0.00%     248.794us      16.586us       0.000us         0.00%       0.000us       0.000us            15  
                                    hipModuleLoadDataEx         0.00%     768.851us         0.00%     768.851us     768.851us       0.000us         0.00%       0.000us       0.000us             1  
                                  hipModuleLaunchKernel         0.00%      66.869us         0.00%      66.869us      33.434us       0.000us         0.00%       0.000us       0.000us             2  
                                             aten::view         0.00%      51.728us         0.00%      51.728us      10.346us       0.000us         0.00%       0.000us       0.000us             5  
                                       aiter::gemm_a4w4         0.01%       7.508ms       100.00%       79.158s       79.158s       0.000us         0.00%       0.839us       0.839us             1  
                            aiter::get_cu_num_custom_op         0.21%     166.191ms         0.21%     166.191ms     166.191ms       0.000us         0.00%       0.000us       0.000us             1  
                                    aiter::get_padded_m        71.18%       56.349s        71.19%       56.350s       28.175s       0.000us         0.00%       0.000us       0.000us             2  
  -----------------------------------------------------  ------------  ------------  ------------  ------------  ------------  ------------  ------------  ------------  ------------  ------------  
  Self CPU time total: 79.159s
  Self CUDA time total: 3.713us

The aten::copy_ probably comes from _clone_data(). Hence, this PR removes it.