The ornamental design for a helmet-shaped remote control holder, as shown and described.
FIG. 1 is a perspective view of a remote control holder in the design of a helmet.
FIG. 2 is a front view of the remote control holder.
FIG. 3 is a rear view of the remote control holder.
FIG. 4 is a side view of the remote control holder. The other side view of the remote control holder is a mirror image of the side view depicted in FIG. 4.
FIG. 5 is a top view of the remote control holder; and,
FIG. 6 is a bottom view of the remote control holder.
The broken lines in the figure are for environmental purposes only and form no part of the claimed design. Viewpoints not illustrated present no additional ornamental features over those illustrated in the present set of drawings.