[Clang][NFC] Remove duplicated subdirectory (#15906)

clang-nvlink-wrapper is added twice in clang/tools/CMakeLists.txt.

Author: bader

clang/tools/CMakeLists.txt

@@ -7,7 +7,6 @@ add_clang_subdirectory(clang-diff)
 add_clang_subdirectory(clang-format)
 add_clang_subdirectory(clang-fuzzer)
 add_clang_subdirectory(clang-import-test)
-add_clang_subdirectory(clang-nvlink-wrapper)
 add_clang_subdirectory(clang-linker-wrapper)
 add_clang_subdirectory(clang-nvlink-wrapper)
 add_clang_subdirectory(clang-offload-packager)