[gn build] Port 74b9484

Author: aeubanks

llvm/utils/gn/secondary/libcxx/include/BUILD.gn

@@ -1435,7 +1435,6 @@ if (current_toolchain == default_toolchain) {
       "__tree",
       "__tuple/find_index.h",
       "__tuple/ignore.h",
-      "__tuple/make_tuple_types.h",
       "__tuple/sfinae_helpers.h",
       "__tuple/tuple_element.h",
       "__tuple/tuple_like.h",