The ornamental design for a shoe upper, as shown and described.
FIG. 1 is a front perspective view of a shoe upper showing my new design;
FIG. 2 is a side view thereof;
FIG. 3 is a rear perspective view thereof;
FIG. 4 is a top view thereof; and,
FIG. 5 is an enlarged view of FIG. 2 with environmental subject matter omitted.
A photographic area is shown in the drawings. The broken lines immediately adjacent to the photographic area define the bounds of the claimed design and form no part thereof. The lack of a broken or solid line immediately adjacent to the photographic area indicates a claimed edge of the design. The broken lines showing the remainder of the shoe represent unclaimed subject matter and form no part of the claimed design.