The ornamental design for a laundryappliance, as shown and described.
FIG. 1 is a perspective view of a laundry appliance showing my new design;
FIG. 2 is a front view thereof;
FIG. 3 is a top view thereof;
FIG. 4 is a right side view thereof, and,
FIG. 5 is a left side view thereof.
The broken line showing of the various surface details in FIGS. 1-5 are for the purpose of illustration only and form no part of the claimed design. The stippling shown in FIGS. 1 and 2 is provided to illustrate contrasting surfaces, and does not represent any particular color, pattern or surface texture.