The ornamental design for a detachableshoestrap, as shown and described.
FIG. 1 is a top perspective view of a detachable shoe strap showing my new design;
FIG. 2 is a bottom perspective view thereof;
FIG. 3 is a front elevation view thereof;
FIG. 4 is a right side elevation view thereof;
FIG. 5 is a rear elevation view thereof;
FIG. 6 is a left side elevation view thereof;
FIG. 7 is a top plan view thereof; and,
FIG. 8 is a bottom plan view thereof.
The broken lines shown on the detachable shoe strap represent thread stitching. The broken lines illustrating the human leg and shoe form no part of the claimed design.