rbtree.h: Take wine_rb_entry as wine_rb_remove argument type and add new wine_rb_remove_key helper using key.
Signed-off-by: Jacek Caban <jacek@codeweavers.com>
Signed-off-by: Henri Verbeet <hverbeet@codeweavers.com>
Signed-off-by: Matteo Bruni <mbruni@codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>