The ornamental design for a wastereceptacle, as shown and described.
FIG. 1 provides a front perspective view of a waste receptacle.
FIG. 2 provides a front view of a waste receptacle.
FIG. 3 provides a rear view of a waste receptacle.
FIG. 4 provides a left side view of a waste receptacle.
FIG. 5 provides a right side view of a waste receptacle; and,
FIG. 6 provides a top view of a waste receptacle.
The broken lines showing decorative cutouts and the inner can in the figures are to show portions of the waste receptacle and form no part of the claimed design.