The ornamental design for a cordlesshaircurler, as shown and described.
FIG. 1 is top plan view of a cordless hair curler showing my new design;
FIG. 2 is a bottom plan view thereof;
FIG. 3 is a front elevational view thereof;
FIG. 4 is right side elevational view thereof;
FIG. 5 is rear elevational view thereof;
FIG. 6 is left side elevational view thereof;
FIG. 7 is a top-front-left side perspective view thereof; and,
FIG. 8 is a top-front-right side perspective view thereof.
The evenly-dashed broken lines in the views show portions of the cordless hair curler that form no part of the claimed design. The dot-dash-dot line shows an unclaimed boundary which forms no part of the claimed design.