The ornamental design for a toilet, as shown and described.
FIG. 1 is a perspective view of a toilet;
FIG. 2 is a front plan view of the toilet of FIG. 1;
FIG. 3 is a back plan view of the toilet of FIG. 1;
FIG. 4 is a right side view of the toilet of FIG. 1;
FIG. 5 is a left side view of the toilet of FIG. 1;
FIG. 6 is top view of the toilet of FIG. 1; and,
FIG. 7 is a bottom view of the toilet of FIG. 1.
The broken lines showing portions of the toilet are included for the purpose of illustrating a portion of the toilet that forms no part of the claimed design.