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; and,
FIG. 3 is a rear perspective view thereof.
The broken lines immediately adjacent to the shaded area represent unclaimed boundaries of the design. The broken lines dividing the strap tip from each of the two claimed strap portions represent unclaimed divisions in the strap material and forms no part of the claimed design. The broken line showing a notch in the material near the upper rear portion of the claim and the unshaded region therein represents unclaimed subject matter and forms no part of the claimed design. The broken lines showing the remainder of the shoe represent unclaimed subject matter and form no part of the claimed design.