[Fix] Remove curand host functions (#5552)

cmake/modules/CUDA.cmake

@@ -315,8 +315,7 @@ macro(dgl_config_cuda out_variable)
   list(APPEND DGL_LINKER_LIBS
     ${CUDA_CUDART_LIBRARY}
     ${CUDA_CUBLAS_LIBRARIES}
-    ${CUDA_cusparse_LIBRARY}
-    ${CUDA_CURAND_LIBRARY})
+    ${CUDA_cusparse_LIBRARY})
 
   set(${out_variable} ${DGL_CUDA_SRC})
 endmacro()

src/random/random.cc

@@ -11,10 +11,6 @@
 #include <dgl/runtime/registry.h>
 #include <dmlc/omp.h>
 
-#ifdef DGL_USE_CUDA
-#include "../runtime/cuda/cuda_common.h"
-#endif  // DGL_USE_CUDA
-
 using namespace dgl::runtime;
 
 namespace dgl {
@@ -28,17 +24,6 @@ DGL_REGISTER_GLOBAL("rng._CAPI_SetSeed")
           RandomEngine::ThreadLocal()->SetSeed(seed);
         }
       });
-#ifdef DGL_USE_CUDA
-      if (DeviceAPI::Get(kDGLCUDA)->IsAvailable()) {
-        auto *thr_entry = CUDAThreadEntry::ThreadLocal();
-        if (!thr_entry->curand_gen) {
-          CURAND_CALL(curandCreateGenerator(
-              &thr_entry->curand_gen, CURAND_RNG_PSEUDO_DEFAULT));
-        }
-        CURAND_CALL(curandSetPseudoRandomGeneratorSeed(
-            thr_entry->curand_gen, static_cast<uint64_t>(seed)));
-      }
-#endif  // DGL_USE_CUDA
     });
 
 DGL_REGISTER_GLOBAL("rng._CAPI_Choice")

src/runtime/cuda/cuda_common.h

@@ -244,8 +244,6 @@ class CUDAThreadEntry {
   cusparseHandle_t cusparse_handle{nullptr};
   /** @brief The cublas handler */
   cublasHandle_t cublas_handle{nullptr};
-  /** @brief The curand generator */
-  curandGenerator_t curand_gen{nullptr};
   /** @brief thread local pool*/
   WorkspacePool pool;
   /** @brief constructor */