[gn build] Port f038dfd

Author: llvmgnsyncbot

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

@@ -1468,7 +1468,6 @@ if (current_toolchain == default_toolchain) {
       "__type_traits/is_array.h",
       "__type_traits/is_assignable.h",
       "__type_traits/is_base_of.h",
-      "__type_traits/is_bounded_array.h",
       "__type_traits/is_callable.h",
       "__type_traits/is_char_like_type.h",
       "__type_traits/is_class.h",
@@ -1518,7 +1517,6 @@ if (current_toolchain == default_toolchain) {
       "__type_traits/is_trivially_destructible.h",
       "__type_traits/is_trivially_lexicographically_comparable.h",
       "__type_traits/is_trivially_relocatable.h",
-      "__type_traits/is_unbounded_array.h",
       "__type_traits/is_union.h",
       "__type_traits/is_unqualified.h",
       "__type_traits/is_unsigned.h",