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 identical;
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 identical.
The broken lines in the drawings, which show beveled surfaces on some of the corners of the feet, are for illustrative purposes only and form no part of the claimed design.