The ornamental design for a shoe upper, as shown and described.
FIG. 1 is a front perspective view of a shoe showing my new design;
FIG. 2 is a side view thereof;
FIG. 3 is a rear perspective view thereof;
FIG. 4 is an opposite side rear perspective view thereof;
FIG. 5 is an opposite side view thereof;
FIG. 6 is an opposite side front perspective view thereof;
FIG. 7 is a front view thereof;
FIG. 8 is a top view thereof; and,
FIG. 9 is a magnified view of a portion of the shoe designated in FIG. 1.
The long and short broken lines immediately adjacent to the photographic area define the bounds of the claimed design, and form no part thereof. The even-length broken lines showing the remainder of the shoe are for environmental purposes only and form no part of the claimed design.