wscript: Remove code check for cuda hwaccel

This was there originally to detect too-old versions of ffmpeg. We now
only support >= 4.0, so it's not relevant. We just need the dependencies
to be present.

waftools/fragments/cuda.c

@@ -1,15 +0,0 @@
-#define CUDA_VERSION 7050
-
-typedef void * CUcontext;
-
-#include <libavcodec/avcodec.h>
-#include <libavutil/hwcontext.h>
-#include <libavutil/hwcontext_cuda.h>
-
-int main(int argc, char *argv[]) {
-    enum AVHWDeviceType type = AV_HWDEVICE_TYPE_CUDA;
-    AVCUDADeviceContextInternal *foo;
-    AVCodecContext *avctx = avcodec_alloc_context3(NULL);
-    avctx->hw_device_ctx = NULL;
-    return 0;
-}

wscript

@@ -842,8 +842,7 @@ hwaccel_features = [
         'name': '--cuda-hwaccel',
         'desc': 'CUDA hwaccel',
         'deps': 'gl && ffnvcodec',
-        'func': check_cc(fragment=load_fragment('cuda.c'),
-                         use='libavcodec'),
+        'func': check_true,
     }
 ]