Remove cuda runtime header, apparently unneeded

Author: mconcas

Detectors/ITSMFT/ITS/tracking/include/ITStracking/Definitions.h

@@ -29,7 +29,6 @@
 
 #if defined(__CUDACC__) || defined(__HIPCC__)
 #ifdef __CUDACC__
-#include <cuda_runtime.h>
 typedef cudaStream_t GPUStream;
 #else // __HIPCC__
 #include <hip/hip_runtime.h>
@@ -40,4 +39,4 @@ typedef struct __dummyStream {
 } GPUStream;
 #endif
 
-#endif
+#endif