The ornamental design for a “fishing line cutter,” as shown and described.
FIG. 1 is a perspective view of a fishing line cutter showing the claimed design;
FIG. 2 is a front view thereof;
FIG. 3 is a rear view thereof;
FIG. 4 is an enlarged left side view thereof;
FIG. 5 is a right side view thereof;
FIG. 6 is a top view thereof;
FIG. 7 is a bottom view thereof;
FIG. 8 is a first reference view showing the claimed design in use;
FIG. 9 is a second reference view showing the claimed design in use; and,
FIG. 10 is a detail view taken from location ‘10’ in FIG. 3.
The dash-dot-dash lines represent a boundary line. The remaining broken lines depict environment and are for illustrative purposes only and form no part of the claimed design.