Drop check for cuFile version

This was only needed for batch and stream API checking. However as both
APIs are part of CUDA 12.2+, which is now our hard requirement, there is
no need to check for them or the cuFile version. So drop this logic.

Author: jakirkham

cpp/CMakeLists.txt

@@ -109,20 +109,6 @@ else()
     OUTPUT_VARIABLE stream_output
   )
   message(STATUS "Found cuFile Stream API: ${cuFile_STREAM_API_FOUND}")
-  try_compile(
-    cuFile_VERSION_API_FOUND SOURCE_FROM_CONTENT
-    version.cpp
-    [[#include <cufile.h>
-    int main() {
-      int version;
-      cuFileGetVersion(&version);
-      return 0;
-    }
-    ]]
-    LINK_LIBRARIES CUDA::cuFile rt ${CMAKE_DL_LIBS}
-    OUTPUT_VARIABLE version_output
-  )
-  message(STATUS "Found cuFile Version API: ${cuFile_VERSION_API_FOUND}")
 endif()
 
 include(cmake/thirdparty/get_thread_pool.cmake)
@@ -188,7 +174,6 @@ target_compile_definitions(
   kvikio
   PUBLIC $<$<BOOL:${KvikIO_REMOTE_SUPPORT}>:KVIKIO_LIBCURL_FOUND>
          $<$<BOOL:${cuFile_FOUND}>:KVIKIO_CUFILE_FOUND>
-         $<$<BOOL:${cuFile_VERSION_API_FOUND}>:KVIKIO_CUFILE_VERSION_API_FOUND>
 )
 
 set_target_properties(

cpp/include/kvikio/shim/cufile.hpp

@@ -43,9 +43,6 @@ class cuFileAPI {
   decltype(cuFileDriverOpen)* DriverOpen{nullptr};
   decltype(cuFileDriverClose)* DriverClose{nullptr};
 
-  // Don't call `GetVersion` directly, use `cuFileAPI::instance().version`.
-  decltype(cuFileGetVersion)* GetVersion{nullptr};
-
  public:
   int version{0};
 

cpp/include/kvikio/shim/cufile_h_wrapper.hpp

@@ -63,12 +63,3 @@ CUfileError_t cuFileDriverSetMaxCacheSize(...);
 CUfileError_t cuFileDriverSetMaxPinnedMemSize(...);
 
 #endif
-
-// If some cufile APIs aren't defined, we define some of the data types here.
-// Notice, this doesn't need to be ABI compatible with the cufile definitions and
-// the lack of definitions is not a problem because the linker will never look for
-// these symbols because the "real" function calls are made through the shim instance.
-
-#ifndef KVIKIO_CUFILE_VERSION_API_FOUND
-CUfileError_t cuFileGetVersion(...);
-#endif