The ornamental design for furniture, as shown and described.
FIG. 1 is a front view of a first embodiment showing my new design;
FIG. 2 is a left side view thereof, the right side view being a mirror image;
FIG. 3 is a front view of a second embodiment showing my new design; and,
FIG. 4 is a left side view thereof, the right side view being a mirror image.
The broken lines in the drawings, showing beveled surfaces on some of the corners of the feet and indicating that no particular handle shape is being claimed, represent environmental subject matter and form no part of the claimed design.