remove default values in source

src/data/TensorImpl.cu

@@ -36,7 +36,7 @@ cudaCopyToH_kernel(const SRC_T* srcData,
     }
 }
 
-template <typename SRC_T, typename std::enable_if<!std::is_same<half_float::half, SRC_T>::value>::type* = nullptr>
+template <typename SRC_T, typename std::enable_if<!std::is_same<half_float::half, SRC_T>::value>::type*>
 void Aidge::thrust_copy(const SRC_T* srcData, half_float::half* dstData, size_t size)
 {
     cudaCopyToH_kernel<SRC_T><<<(size + 255) / 256, 256>>>
@@ -58,7 +58,7 @@ cudaCopyFromH_kernel(const __half* srcData,
     }
 }
 
-template <typename DST_T, typename std::enable_if<!std::is_same<half_float::half, DST_T>::value>::type* = nullptr>
+template <typename DST_T, typename std::enable_if<!std::is_same<half_float::half, DST_T>::value>::type*>
 void Aidge::thrust_copy(const half_float::half* srcData, DST_T* dstData, size_t size)
 {
     cudaCopyFromH_kernel<DST_T><<<(size + 255) / 256, 256>>>