The ornamental design for bassinet, as shown and described.
FIG. 1 is a perspective view of the bassinet embodying my new design;
FIG. 2 is a perspective view of the bassinet with a pull-out surface extended;
FIG. 3 is a front view thereof, the rear view being a mirror image thereof;
FIG. 4 is a top plan view thereof;
FIG. 5 is a bottom plan view thereof;
FIG. 6 is a right side elevational view thereof; and,
FIG. 7 is a left side elevational view thereof.
FIGS. 1-7 show portions of the bassinet in phantom lines. The phantom line portions are shown for environmental purposes and form no part of the claimed design.