message: Address reviewer comments to remove dead / obsolete codes / macros
diff: @@ -52,25 +52,16 @@ limitations under the License.
  #if GOOGLE_CUDA
  #define gpuSuccess cudaSuccess
  -#define GPUGETERRORSTRING(error) cudaGetErrorString(error)
  using gpuStream_t = cudaStream_t;
  -#define GPUGETLASTERROR() cudaGetLastError()
  using gpuError_t = cudaError_t;
  -#define GPUSUCCESSS cudaSuccess
  +
  #elif TENSORFLOW_USE_ROCM
  #define gpuSuccess hipSuccess
  -#define GPUGETERRORSTRING(error) hipGetErrorString(error)
  using gpuStream_t = hipStream_t;
  -#define GPUGETLASTERROR() hipGetLastError()
  using gpuError_t = hipError_t;
  -#define GPUSUCCESSS hipSuccess
  #endif
  -#if GOOGLE_CUDA
  #define GetGPUStream(context) context->eigen_gpu_device().stream()
  -#elif TENSORFLOW_USE_ROCM
  -#define GetGPUStream(context) context->eigen_gpu_device().stream()
  -#endif
  namespace tensorflow {
  __host__ __device__ inline tensorflow::bfloat16 CudaLdg(
  