Remove stale non-SYCL TBB workaround

Author: allnes

3rdparty/CMakeLists.txt

@@ -10,16 +10,7 @@ option(TBB_EXAMPLES "Build TBB examples" OFF)
 set(TBB_STRICT OFF CACHE BOOL "Treat compiler warnings as errors")
 
 # Configure TBB with unified settings
-if(WIN32 AND CMAKE_CXX_COMPILER_ID STREQUAL "Clang"
-   AND NOT CMAKE_CXX_COMPILER_FRONTEND_VARIANT STREQUAL "MSVC")
-    set(_itlabai_saved_mingw "${MINGW}")
-    set(MINGW TRUE)
-endif()
 add_subdirectory(TBB)
-if(DEFINED _itlabai_saved_mingw)
-    set(MINGW "${_itlabai_saved_mingw}")
-    unset(_itlabai_saved_mingw)
-endif()
 
 # Create a unified TBB interface target
 if(NOT TARGET TBB_unified)