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 an enlarged view of FIG. 1 with environmental portions removed for clarity;
FIG. 5 is an enlarged view of FIG. 2 with environmental portions removed for clarity; and,
FIG. 6 is an enlarged view of FIG. 3 with environmental portions removed for clarity.
The broken lines immediately surrounding to the shaded area represents an unclaimed peripheral boundary of the design. The broken lines showing the remainder of the shoe are for environmental purposes only and form no part of the claimed design.