The ornamental design for a litterscoop, as shown and described.
FIG. 1 is a front, perspective view of a litter scoop showing our new design;
FIG. 2 is a front elevational view thereof;
FIG. 3 is a rear elevational view thereof;
FIG. 4 is a right side elevational view thereof, the left side elevational view being an identical mirror image thereof;
FIG. 5 is a top plan view thereof; and,
FIG. 6 is a bottom plan view thereof.
The small dash, small dash lines in FIGS. 1-6 of the litter scoop are for the purpose of illustrating environment, and form no part of the claimed design. The short dash, large dash lines in FIGS. 1-6 of the litter scoop are for the purpose of illustrating the boundaries of the claimed design, and form no part of the claimed design.