Don't export Vista+, unused and unimplemented APIs.
Some apps / tests detect their presence and try to use them.
svn path=/trunk/; revision=55419
@ stdcall RegCreateKeyExW(long wstr long ptr long long ptr ptr ptr)
@ stdcall RegCreateKeyW(long wstr ptr)
@ stdcall RegDeleteKeyA(long str)
-@ stdcall RegDeleteKeyExA(long str long long)
-@ stdcall RegDeleteKeyExW(long wstr long long)
+;@ stdcall RegDeleteKeyExA(long str long long)
+;@ stdcall RegDeleteKeyExW(long wstr long long)
@ stdcall RegDeleteKeyW(long wstr)
@ stdcall RegDeleteKeyValueA(ptr str str)
@ stdcall RegDeleteKeyValueW(ptr wstr wstr)