The ornamental design for a sanitarybin, as shown and described.
FIG. 1 is a perspective view of a sanitary bin showing my new design;
FIG. 2 is a front elevation view thereof;
FIG. 3 is a right elevation view thereof;
FIG. 4 is a left elevation view thereof;
FIG. 5 is a rear elevation view thereof;
FIG. 6 is a top plan view thereof; and,
FIG. 7 is a bottom plan view thereof.
The broken lines shown in the figures are included for the purpose of illustrating portions of the sanitary bin which form no part of the claimed design.