I claim the ornamental design for a brushcutter, as shown and described.
FIG. 1 is a right side perspective view of the brushcutter;
FIG. 2 is a front side view of the design shown in FIG. 1;
FIG. 3 is a back side view of the design shown in FIG. 1;
FIG. 4 is a left side view of the design shown in FIG. 1;
FIG. 5 is a right side view of the design shown in FIG. 1;
FIG. 6 is a top side view of the design shown in FIG. 1; and,
FIG. 7 is a bottom side view of the design shown in FIG. 1.
The broken line showing of the brushcutter are included for the purpose of illustrating portions of the article and form no part of the claimed design.