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 uneven length broken line showing of the two eyelet regions and the upper lacing element represents subject matter that forms no part of the claimed design. The uneven length broken lines on the heel counter represents a feature that forms no part of the claimed design. The even length broken lines within the claim boundary represents stitching and forms no part of the claimed design. The uneven length broken lines showing the remainder of the shoe are for environmental purposes only and form no part of the claimed design.