Removes unused CUDA generator includes

Cleans up unnecessary ATen CUDA generator imports that are no longer referenced in the codebase.

Reduces compilation dependencies and improves build performance.

Author: LoserCheems

csrc/flash_api.cpp

@@ -7,8 +7,6 @@
 #include <torch/nn/functional.h>
 #include <c10/cuda/CUDAGuard.h>
 #include <c10/cuda/CUDAStream.h>
-#include <ATen/cuda/CUDAGeneratorImpl.h>  // For at::Generator and at::PhiloxCudaState
-#include <ATen/cuda/detail/UnpackRaw.cuh> // For at::cuda::philox::unpack
 
 #include <cutlass/numeric_types.h>
 

csrc/src/flash.h

@@ -9,8 +9,6 @@
 #include <cuda.h>
 #include <vector>
 
-#include <ATen/cuda/CUDAGeneratorImpl.h> // For at::Generator and at::PhiloxCudaState
-
 namespace FLASH_NAMESPACE {
 constexpr int TOTAL_DIM = 0;
 constexpr int H_DIM = 1;