cleanup: remove AddCUDAToolkit

Author: evaleev

cmake/modules/AddCUDAToolkit.cmake

@@ -15,9 +15,8 @@ set(ut_libs Catch2::Catch2)
 # we definitely have TARGET std::coroutine
 if (CXXStdCoroutine_FOUND)
     list(APPEND ut_src fibonacci-coro.cc)
-    list(APPEND ut_src device_coro.cc)
     if (TTG_HAVE_CUDA)
-        list(APPEND ut_src cuda_kernel.cu)
+        list(APPEND ut_src device_coro.cc cuda_kernel.cu)
     endif(TTG_HAVE_CUDA)
     list(APPEND ut_libs std::coroutine)
 endif(CXXStdCoroutine_FOUND)