The ornamental design for a shoe upper, as shown and described.
FIG. 1 is a side elevational view of the shoe upper according to a first embodiment of the present invention.
FIG. 2 is a perspective view of the shoe upper according to the first embodiment.
FIG. 3 is a side elevational view of the shoe upper according to a second embodiment of the present invention.
FIG. 4 is a perspective view of the shoe upper according to the second embodiment.
FIG. 5 is a side elevational view of the shoe upper according to a third embodiment of the present invention.
FIG. 6 is a perspective view of the shoe upper according to the third embodiment.
FIG. 7 is a side elevational view of the shoe upper according to a fourth embodiment of the present invention; and,
FIG. 8 is a perspective view of the shoe upper according to the fourth embodiment.
The circles shown in broken lines within the solid-line circular design elements form no part of the claimed design. The other broken lines illustrate environment and also form no part of the claimed design.