[libc++] Remove empty header xlocale/xlocale.h

[ldionne]

Summary

I can't think of a reason for shipping this empty header. If there is
a reason to do so, then hopefully this review can uncover it.

[mclow.lists]

It was added as part of https://reviews.llvm.org/D17416, and that is all it's ever been.

[ldionne]

In D59137#1422846, @mclow.lists wrote:

It was added as part of https://reviews.llvm.org/D17416, and that is all it's ever been.

Ah, thanks for digging this up. So basically the contents of the file were deleted but the file itself wasn't removed. So it seems like it's safe to remove it.

[mclow.lists]

So basically the contents of the file were deleted but the file itself wasn't removed

I don't think that's right. I think that it was created empty.

[EricWF]

In D59137#1423399, @mclow.lists wrote:

So basically the contents of the file were deleted but the file itself wasn't removed

I don't think that's right. I think that it was created empty.

The patch says the file was deleted, and it shows the old contents of the header.
Somehow SVN didn't delete the file.

LGTM.

[mclow.lists]

I'm fine with this.

libcxx/trunk/include/CMakeLists.txt

set(files
     support/solaris/floatingpoint.h
     support/solaris/wchar.h
     support/solaris/xlocale.h
     support/win32/limits_msvc_win32.h
     support/win32/locale_win32.h
     support/xlocale/__nop_locale_mgmt.h
     support/xlocale/__posix_l_fallback.h
     support/xlocale/__strtonum_fallback.h
-    support/xlocale/xlocale.h
     )
 endif()
 
 if (LIBCXX_NEEDS_SITE_CONFIG)
   # Generate a custom __config header. The new header is created
   # by prepending __config_site to the current __config header.
   add_custom_command(OUTPUT ${LIBCXX_BINARY_DIR}/__generated_config
     COMMAND ${PYTHON_EXECUTABLE} ${LIBCXX_SOURCE_DIR}/utils/cat_files.py