Drop is_batch_api_available & is_stream_api_available

As of CUDA 12.2+, these functions are always true as the relevant APIs
are always included. So go ahead drop them. Also equate their calls to
`true` in relevant logic.

Author: jakirkham

cpp/examples/basic_io.cpp

@@ -170,7 +170,7 @@ int main()
     cout << "Parallel POSIX read (" << kvikio::defaults::thread_pool_nthreads()
          << " threads): " << read << endl;
   }
-  if (kvikio::is_batch_api_available() && !kvikio::defaults::is_compat_mode_preferred()) {
+  if (!kvikio::defaults::is_compat_mode_preferred()) {
     std::cout << std::endl;
     Timer timer;
     // Here we use the batch API to read "/tmp/test-file" into `b_dev` by

cpp/include/kvikio/shim/cufile.hpp

@@ -110,26 +110,4 @@ bool is_cufile_available() noexcept;
  */
 int cufile_version() noexcept;
 
-/**
- * @brief Check if cuFile's batch API is available.
- *
- * Since `cuFileGetVersion()` first became available in cufile v1.8 (CTK v12.3),
- * this function returns false for versions older than v1.8 even though the batch
- * API became available in v1.6.
- *
- * @return The boolean answer
- */
-bool is_batch_api_available() noexcept;
-
-/**
- * @brief Check if cuFile's stream (async) API is available.
- *
- * Since `cuFileGetVersion()` first became available in cufile v1.8 (CTK v12.3),
- * this function returns false for versions older than v1.8 even though the stream
- * API became available in v1.7.
- *
- * @return The boolean answer
- */
-bool is_stream_api_available() noexcept;
-
 }  // namespace kvikio

cpp/src/compat_mode_manager.cpp

@@ -74,22 +74,19 @@ CompatModeManager::CompatModeManager(std::string const& file_path,
   }
 
   // Check cuFile async API
-  static bool const is_extra_symbol_available = is_stream_api_available();
-  static bool const is_config_path_empty      = config_path().empty();
+  static bool const is_config_path_empty = config_path().empty();
   _is_compat_mode_preferred_for_async =
-    _is_compat_mode_preferred || !is_extra_symbol_available || is_config_path_empty;
+    _is_compat_mode_preferred || is_config_path_empty;
 }
 
 void CompatModeManager::validate_compat_mode_for_async() const
 {
   KVIKIO_NVTX_FUNC_RANGE();
   if (_is_compat_mode_preferred_for_async && _compat_mode_requested == CompatMode::OFF) {
     std::string err_msg;
-    if (!is_stream_api_available()) { err_msg += "Missing the cuFile stream api."; }
-
-    // When checking for availability, we also check if cuFile's config file exists. This is
+    // When checking for availability, we check if cuFile's config file exists. This is
     // because even when the stream API is available, it doesn't work if no config file exists.
-    if (config_path().empty()) { err_msg += " Missing cuFile configuration file."; }
+    if (config_path().empty()) { err_msg += "Missing cuFile configuration file."; }
 
     KVIKIO_FAIL(err_msg, std::runtime_error);
   }

cpp/src/shim/cufile.cpp

@@ -111,8 +111,4 @@ int cufile_version() noexcept
 int cufile_version() noexcept { return 0; }
 #endif
 
-bool is_batch_api_available() noexcept { return cufile_version() >= 1060; }
-
-bool is_stream_api_available() noexcept { return cufile_version() >= 1070; }
-
 }  // namespace kvikio