The ornamental design for a portion of a shavingrazor, as shown and described.
FIG. 1 is a perspective view of a portion of a shaving razor of the present invention;
FIG. 2 is a top view thereof;
FIG. 3 is a bottom view thereof;
FIG. 4 is a right view thereof;
FIG. 5 is a left view thereof;
FIG. 6 is a front view thereof; and,
FIG. 7 is a rear view thereof.
The broken lines which connect the ends of the existing full line disclosure define the bounds of the claimed design. All other broken lines are for illustrative purposes only. None of the broken lines forms part of the claimed design.