headers: winnt.h: remove commented out constant SUBLANG_ROMANIAN_MOLDOVA

This constant is not present in winnt.h from recent Windows SDKs.

This constant is incorrect; LCID locale for "ro-MD" uses sublanguage ID 0x02
and not 0x01 as this constant suggests.

Signed-off-by: LIU Hao <lh_mouse@126.com>