The ornamental design for a scooter, as shown and described.
FIG. 1 is a front perspective view of a scooter;
FIG. 2 is a rear perspective view thereof;
FIG. 3 is a front view thereof;
FIG. 4 is a rear view thereof;
FIG. 5 is a left side view thereof;
FIG. 6 is a right side view thereof;
FIG. 7 is a top view thereof;
FIG. 8 is a bottom view thereof;
FIG. 9 is an enlarged partial view of the handlebar grip in FIG. 1;
FIG. 10 is an enlarged partial view of the handlebar in FIG. 2;
FIG. 11 is an enlarged partial view of the front wheel in FIG. 2; and,
FIG. 12 is an enlarged partial view of the kick stand in FIG. 2.
The broken lines are for the purpose of illustrating portions of the scooter that form no part of the claimed design. The broken lines in FIGS. 9-12 represent the boundaries of the enlarged partial views and form no part of the claimed design.