Remove upstream workarounds for CMake "limitations" that do not appear to exist
in nixpkgs build environment, but rather break the build, presumably because
CMAKE_INSTALL_{BIN,LIB}DIR is an absolute path in our build so
CMAKE_INSTALL_PREFIX has no effect.

diff --git a/devices/CMakeLists.txt b/devices/CMakeLists.txt
index d5111cd..43986ad 100644
--- a/devices/CMakeLists.txt
+++ b/devices/CMakeLists.txt
@@ -53,7 +53,6 @@ if(OIDN_DEVICE_CUDA)
       -DCMAKE_CXX_COMPILER:FILEPATH=${_host_compiler}
       -DCMAKE_TOOLCHAIN_FILE:FILEPATH=${CMAKE_TOOLCHAIN_FILE}
       -DCMAKE_BUILD_TYPE:STRING=${CMAKE_BUILD_TYPE}
-      -DCMAKE_INSTALL_PREFIX:PATH=${CMAKE_CURRENT_BINARY_DIR}/cuda/preinstall
       -DCMAKE_INSTALL_BINDIR:PATH=${CMAKE_INSTALL_BINDIR}
       -DCMAKE_INSTALL_LIBDIR:PATH=${CMAKE_INSTALL_LIBDIR}
       -DCUDAToolkit_ROOT:PATH=${CUDAToolkit_ROOT}
@@ -69,14 +68,6 @@ if(OIDN_DEVICE_CUDA)
     DEPENDS
       OpenImageDenoise_core
   )
-
-  # Due to limitations of CMake, the module is pre-installed at build time to a temporary location,
-  # and then copied to the real install location at install time.
-  install(DIRECTORY
-    ${CMAKE_CURRENT_BINARY_DIR}/cuda/preinstall/
-    DESTINATION "."
-    USE_SOURCE_PERMISSIONS
-  )
 endif()
 
 if(OIDN_DEVICE_HIP)