message: Remove useless part of CMakeLists.txt.
diff: @@ -19,10 +19,6 @@ if(BUILD_GPU)
  project(Ginkgo LANGUAGES CXX CUDA)
  set(CMAKE_CUDA_STANDARD_REQUIRED true)
  set(CMAKE_CUDA_STANDARD 11)
  - if (CMAKE_CUDA_COMPILER_VERSION VERSION_GREATER_EQUAL 9)
  - set(CMAKE_CUDA_FLAGS "-Wno-deprecated-declarations ${CMAKE_CUDA_FLAGS}"
  - CACHE string "")
  - endif()
  if(CMAKE_CUDA_COMPILER_VERSION VERSION_LESS 9)
  set(CMAKE_CUDA_FLAGS "--expt-relaxed-constexpr
  ${CMAKE_CUDA_FLAGS}" CACHE string "")
  