revert logger visibility fix (should no longer be necessary as of rap…

…idsai/rmm#1645 and rapidsai#15982)

cpp/include/cudf/utilities/logger.hpp

@@ -43,11 +43,6 @@ namespace CUDF_EXPORT cudf {
  *
  * @return spdlog::logger& The logger.
  */
-// This is a workaround for Doxygen not being able to parse the `visibility` attribute
-/// \cond DOXYGEN_IGNORE
-// We need this symbol to be visible because this TU is marked as having all
-// symbols hidden by default in cpp/CMakelists.txt.
-__attribute__((visibility("default"))) spdlog::logger& logger();
-/// \endcond
+spdlog::logger& logger();
 
 }  // namespace CUDF_EXPORT cudf