Deleted the old CUDA platform

platforms/cuda-old/tests/has_cuda_gpu.c

-#include <stdio.h>
-#include <cuda_runtime.h>
-
-int main() {
-    int deviceCount, device;
-    int gpuDeviceCount = 0;
-    struct cudaDeviceProp properties;
-    cudaError_t cudaResultCode = cudaGetDeviceCount(&deviceCount);
-    if (cudaResultCode != cudaSuccess) 
-        deviceCount = 0;
-    /* machines with no GPUs can still report one emulation device */
-    for (device = 0; device < deviceCount; ++device) {
-        cudaGetDeviceProperties(&properties, device);
-        if (properties.major != 9999) /* 9999 means emulation only */
-            ++gpuDeviceCount;
-    }
-    printf("%d GPU CUDA device(s) found\n", gpuDeviceCount);
-
-    /* don't just return the number of gpus, because other weird
-       errors can yield non-zero return values */
-    if (gpuDeviceCount > 0)
-        return 0; /* success */
-    else
-        return 1; /* failure */
-}
-